Sunday, March 30, 2014
A Year with the VX
Well, almost a
year, anyhow, muchachos. I bought Celestron’s successor to the much-loved CG5 German
equatorial mount last May (2013). I thought y’all might be interested to hear how we
are getting along and some of my observations on the mount after using it as
much as I could over the course of a year that was the cloudiest I remember
since 1994.
“Wait just one cotton picking minute, Unk. I thought the
subject of this week’s blog was supposed to be your latest jaunt down to Chiefland Astronomy Village?” That
it was, that it was. There were two flies in that ointment, however.
The first was weather. The closer we
got to the date of the legendary Chiefland Spring Picnic, the worse the 10-day forecasts on
Wunderground and weather.com became. These forecasts settled into a dreary
sameness: “Overcast Thursday night. 80 –
90% chance of rain and thunderstorms Friday and Saturday.”
Frankly, I wasn’t much in the mood to spend yet another
long weekend sitting in a room in the Chiefland Quality Inn looking at cable TV. I’d hate to miss the big spring do and seeing my old
friends, though, so I spoke to Carl Wright, who is a lot closer to
the CAV than I am, to see what he thought. Alas, Carl didn't offer a speck of
encouragement weather-wise. Nevertheless, I’d normally, as you know, have said,
“Damn the Wunderground; full speed ahead!” But there was another factor to
consider this time…
If you’ve been following the blog long, you know Unk
retired from his engineering job last year, in February of 2013, to be exact. One of the things Miss Dorothy and I agreed would
happen after that was that we’d pull up stakes and move out of the Old Manse.
Much as I loved our Victorian home in the Garden District, it had become too much. Too much room. Too much upkeep.
I was also longing for a place where I could do at least some observing. The
growth of trees in and around Chaos Manor South’s backyard has prevented that
for years.
So, we hopped in the 4Runner, Miss Van Pelt, last Saturday afternoon with no grander intention than of driving around and having a look at a few suburban neighborhoods. We almost immediately found a subdivision we liked, one close to the University and numerous friends. When we got home, I fired up realtor.com and started looking at details of the homes we’d seen for sale in “Hickory Ridge.”
Right off the bat, I found a house I liked. Single story. Brick. Big backyard. Miss Dorothy
liked it too, especially after we had a look at its Open House that Sunday. In fact,
she was downright enthusiastic.
Still, as we always do, D. and I maintained a “business is business” attitude
when we talked to the seller’s agent. Keeping emotion tamped down is the best
way, we've found, to assure success in business endeavors—which is what buying
a house is, no matter how many emotions are stirred in the process.
Anyhow, by Tuesday morning, almost unbelievably, we were making an offer, which was promptly
accepted, and we've now begun the mountains of paperwork and mucho hoop-jumping
required to purchase a home these days. I was busy,
tired, and most assuredly not ready for a big observing expedition. I cancelled my motel reservations down
Chiefland Way—is there any sadder phrase in the English language than that?
Rest assured, I WILL head back to the CAV this coming May New Moon come hell or
high water, I promise (April’s dark of the Moon will bring the 2014 Deep South
Regional Star Gaze Spring Scrimmage).
Does this spell the end of fabled Chaos Manor South? Nope.
We will be here for some weeks yet. More importantly, “Chaos Manor South” is
not just a place. It is a state of mind. It is the state of Unk’s mind, such as it is, and he
carries it around with him wherever he goes. Expect to hear a lot more about
the new Chaos Manor South in the
coming months, but I believe you, our friends, will be pleased for us.
Back to the Celestron Advanced VX. Why did I want a VX anyhow? I had a perfectly good CG5. That mount
performed as well as it ever had at last spring’s Deep South Regional Star Gaze Spring Scrimmage, helping me image over a hundred objects despite there only
being only one fully clear night during the whole three day event. Since the VX
and the CG5 are roughly comparable, why would your stingy Uncle offer up dineros
for a VX?
The main reason was that the CG5 was getting long in
the tooth. It was nearly a decade old; I bought it on a semi-whim in the
spring of 2005. Yes, it did as well as it ever had at that Spring Scrimmage, but
it had a lot of miles on it, and was not an expensive mount to begin with.
Seeing as how I rely on a C8 – GEM combo for much of my observing now, having a
reliable medium weight mount is important to me. I dang sure don’t want to lug my
Atlas all over creation. I decided the coming of the new VX was a signal it was
time to relegate the CG5 to backup status.
I also wanted a retirement
present. I make no secret of the fact that retirement was a big adjustment
for me. The excitement of a new telescope and mount would, I thought, help ease
the Rodster into his new life. Coincidentally, Celestron had just announced a
package deal consisting of the CG5’s new replacement, the VX, and an Edge 800
SCT OTA for an attractive price.
I’d been admiring the Edge 800 for months and months and
months, and we will talk about her and her sisters again sometime soon. Today,
though, the subject is the mount. Would the VX be better than the CG5? Looking
at the specs and talking to people who’d used the mount, I could tell the newun
was more like the old mount than different. Similar payload capacity, and, I
suspected, a similar periodic error. Which was good, since I never had any
problem guiding the CG5 for any length of exposure I wanted to do. Also good
was that the VX’s weight was about the same as that of the CG5—nice and light,
a godsend for your broken down Uncle.
There were
differences. Quite a few, actually. The VX was not just a gussied up CG5, it seemed. Yes,
the tripod was almost the same as that of its predecessor, but that’s where
the similarities ended. The GEM head had been completely redesigned. It was
more attractive, better finished, and sturdier. In the “real good” category,
Celestron completely redid the control panel. It was now part of the polar
axis—the old mount’s control panel was on the RA motor’s plastic housing and
had a definite tacked-on look.
The new control panel offered the same connections as the
CG5: auto-guide (ST-4 input), declination, and hand control, plus a couple of
new ones, Aux 1, and Aux 2. The connector for the declination cable had been
moved away from the others on the VX and was now vertically oriented
on the right side of the panel. That would make it much less likely you’d plug
the HC into the declination port, which Unk used to do frequently with the CG5—risking
possible electronics damage. Only complaint? How come the hand control receptacle
was the second port on the control panel instead of the first, which would seem
to make sense? Oh, well.
A constant source of irritation for CG5 owners, including
Unk, was the mount’s small power switch, which inevitably failed. Mine lasted
about three years. After that, I left it in the “on” position permanently, and
turned the mount on and off by plugging and unplugging the power cable. That
worked, but was hardly an elegant solution. On the VX, the power switch, I
could see, was now a nice big one that looked easier to operate and which I suspected
would be longer-lived.
There was a red pilot light on the control panel, and,
finally, a 12-volt power connector. The new power connector was furnished with
a threaded collar like the one on the CGEM’s power socket. That allows you to
thread-on the power cable as well as plug it in, which helps maintain a good
connection, I suppose. Might not be a good thing if you tend to snag or trip
over your cables, howsomeever.
That was it for the visible electrical/electronic
improvements. There were apparently some invisible ones too, including a new
motor control board that supposedly helped with guiding, but I never
had problems in that regard with the CG5.
The remaining upgrades were of a mechanical nature, and
they were significant. The altitude and azimuth adjustment bolts, the flimsy
little adjustment bolts of the CG5, had been replaced with hefty bolts with
great, big knobs. The VX’s counterweight shaft was of the same diameter as the
CG5’s, but longer, allowing a C8 to balance with a single 11-pound “pancake”
weight. The single included counterweight (with the C8 package) was redone, too.
It was much more attractive and modern looking than the old Synta weights, and
its clamp bolt had a nice big T-handle (the old style weights still work on the
VX). The CG5’s RA axis end cover, which always wanted to fall off, was ditched
for a nice molded plastic thread-on job for the VX.
Finally, Celestron replaced the silly stick-on labels that
served as index marks for the CG 5 with engraved lines on the RA and
declination axis. These index markers allow you to set the mount in its proper “home”
position before beginning alignment—ain’t no position switches on a CG5 or VX. I
thought the new ones would be easy to see after dark with the aid of a dim red
light.
Actually, I fibbed. There was one other electronic/computer
change, Unk was told, and one he wasn’t sure he liked. The old Celestron
NexStar hand control was history.
What was shipping with the VX mounts was the new “Plus” version. While this
thing supposedly had a faster computer and better display, Unk had not been impressed when he’d tried his
buddy John’s Plus HC at the CAV the previous winter. Main complaint? There are
no longer “M” and “NGC” buttons. To get to either catalog, you have drill down
through a deep sky object menu, just like on a cotton picking Meade Autostar.
Sheesh.
Your silly old Uncle was
quite impressed with the mount’s specs and with the pretty full-page ads he saw
for the Edge 800/VX combo in Sky and
Telescope. Course, now he had to get
one, which is always an adventure in amateur astronomy. It had taken forever
for Unk’s CG5 to arrive. It had been on its way to Possum Swamp when the UPS
truck carrying it had crashed and burned on the Interstate—that’s what the
seller told Unk, anyhow. It was weeks before the CG5 finally arrived.
At first, it looked like things would go smoother with the
VX/Edge. I ordered it from my go-to guy, Bob
Black, whose Skies Unlimited is my dealer
of choice in these latter days. The new scope and mount arrived at the Old
Manse promptly, right after I returned from a gig at the renowned Raleigh Astronomy Club, where I gave a talk on the
Herschel Project.
Yep, it looked like the newun would spare Unk the travails
usually associated with buying new gear. The OTA was perfect, and the mount at
first seemed to be the same. I did
notice a couple of peculiarities. The “toe-saver” bolt on the end of the
declination counterweight shaft would not thread on all the way. Also, the
central rod that threads into the GEM head to attach it to the tripod didn't
want to screw in as easily as the ones on my CG5 and Atlas. In all other
respects, the new mount appeared to be “go,” however.
Till I tried to remove the GEM head from the tripod to take
the rig out to my buddy Pat Rochford’s observatory for first light, that is.
Seemed kinda hard to unscrew the central bolt/rod. Then, suddenly, it locked
down. Hard. Wouldn't unscrew at all. Period. Couldn't tighten it back up,
either. Gentle persuasion wouldn’t loosen it. Spraying a little WD-40 didn't
help. With a sinking feeling, I realized I was in trouble.
The head would obviously have to come off the tripod somehow
for me to ship the mount back, which was purty obviously what was going to have
to happen. I began gently with a strap wrench, which wouldn’t turn the rod a
millimeter. I wound up with a pipe wrench that bent the central rod in the
course of getting the head off the tripod, not surprisingly destroying the hole
into which the rod was threaded in the process.
My assumption was (and is) that the hole for the central
bolt was improperly threaded, just like the one for the counterweight shaft
toe-saver. Anyhoo, having a good dealer made the difference. Bob and Celestron
got a new mount on the way and issued a UPS call tag for the old one. Unfortunately,
the replacement didn't quite make it in time for the Spring Scrimmage, which is
why the CG5 mount got a crack at the star party. The VX was waiting for me when
I got back home and this time everything really was perfect.
Did the Edge 800 OTA, Mrs. Emma Peel, do as well on the VX
as she had on the CG5? Yes. But it took me quite a while to
find that out. The sad fact was that after after the AVX's replacement arrived, we’d seen our last clear weather for a long, long time.
I did get out a couple of times under marginal conditions,
and was able to verify the new mount’s basic operation in a half-hour of clear
skies I got one evening. The goto accuracy seemed every bit as good as that of
the CG5, which is saying something—the CG5’s goto prowess was always equal to
or superior to that of my much more expensive NexStar 11. The new mount’s motors
were also quieter than those of the CG5; there were no more
weasels-with-tuberculosis noises to disturb the sanctity of the Possum Swamp
Astronomical Society observing field.
There things remained until October 2013. I did do a
considerable amount of lunar imaging and
some spectroscopy, but a full-blown Mallincam crusade against the deep sky, a
hundred object deep sky tear? Uh-uh.
I didn't see a fracking thing, really, till October began to
approach. When I finally got a semi-good night, I was ready for it. My mission
was both to give the VX a completely clean bill of health and to test a new
deep sky video camera I was excited about, the
Mallincam Junior Pro. That night on the PSAS field wasn’t perfect, but I
did have enough sucker holes to allow me to image about a dozen objects with Junior.
The mount did brilliantly, and I even made friends with the AllStar
polar alignment procedure.
The VX, like the CG5, does NOT need a good polar alignment
for visual observing. Just sighting the pole star through the mount’s empty
polar axis bore is enough. If you are imaging, however, even doing short
exposures with a Mallincam, you want to do a better polar alignment to ensure
stars are nice and round in your pictures.
Celestron has had an automated polar alignment routine in
their hand controls for a long time. The original procedure used Polaris.
Center Polaris it the eyepiece (or camera) using altitude and azimuth adjusters
after the mount pointed to where its computer thought the North Star should be given a perfect polar alignment,
and you were done.
In 2008, though, Celestron gave into the dreaded The Only Enemy of Good Enough is More Better
syndrome and released a new firmware load for their GEMs that replaced the
Polaris procedure with the AllStar polar alignment system, which would allow
you to use any star (sort of) except
Polaris for polar alignment. I tried the new firmware with my CG5 down Chiefland Way one January—and immediately went back to the old firmware. I just
thought the Polaris method was easier, and it was more than good enough for video
imaging.
When I got the VX, I figgered I’d load up the HC with the
old GEM firmware and continue to use the Polaris align system. Uh-uh. Nossir
buddy. The old firmware couldn’t be loaded into the new Plus HC. Heck, I
couldn’t even run the old code with NexRemote
connected to the VX. NexRemote would
not work with the mount without using the newer firmware builds.
A Man’s Gotta Do What
a Man’s Gotta Do, so that night with the VX and Junior I buckled down and
learned how to use AllStar. Wasn't bad at all. Worked well and easily (if not
as easily as the old method, if’n you ask me) if you used a star near the
intersection of the Celestial Equator and the Local Meridian. Due south and not
too high, that is. It even seemed like the polar alignment I got was a
smidge better than the ones produced by the old Polaris alignment.
The VX finally got its chance to shine last November at the
2013 DSRSG. The main goal was imaging as many Arp galaxies as possible with the
Mallincam Xtreme, but on one of the two good nights, I also did visual
observing with Miss Dorothy’s new Explore Scientific AR102 refractor on the VX. The mount performed superbly on both evenings, doing
over 75 Arps and dozens and dozens of showpiece DSOs besides. I noted the stars
stayed pleasingly round even in one-minute Mallincam integrations—with no
guiding, natch.
After the DSRG? Mostly, the AVX and Unk have sat under cloudy
skies. The few times we've got out, the mount has shown itself to be a
reliable, solid performer—just like the CG5. How about guided imaging? Can’t
say. Ain’t done none. Ain’t been able
to. I hope to rectify that in the near future, however. What do I expect in
that regard? I expect the mount to be at least as easy to guide as the CG5,
which would be a good thing. I used to have no trouble doing up to ten-minute
subs with the C8 and the CG5 and my SBIG ST2000 CCD cam.
Is there anything I do NOT like about the VX? Only one
thing: the way I have to connect my computer to the mount to run the NexRemote software. Y’all know I like to
operate my Celestron mounts with the program. I sit warm and cozy under a
tailgating canopy viewing Mallincam video on a monitor and controlling the
scope with an on-computer NexStar HC courtesy of NexRemote. It is a big deal for me.
I connected the computer to the CG5 via a “programming” cable
that ran to a “PC Port” on the mount. Unlike some Celestron mounts, the CG5
doesn't have a native PC Port. One was provided by a (no longer made) gadget
called the “Aux Port Accessory.” You can also run NexRemote by plugging a standard serial cable into the base of the
NexStar hand control, but going to the PC port is a better solution. You don’t
have to fool with the hardware HC. Doesn't have to be plugged in. You can leave
it at home.
Thought I’d do the same with the VX, which, like the CG5,
has no PC Port. Nope. The Aux Port Accessory wouldn’t work with the new mount. OK, Celestron
was advertising that their latest
widget, the SkyQ Link, would allow
you to run NexRemote wirelessly from
a laptop. Wouldn't have to have the hand control plugged into the mount, either. Since they specifically advertised
it to work with the AVX, I thought my problems were over and ordered one.
But it didn't work
with the AVX. I should probably have returned the blamed thing, but Celestron
made some soothing noises about fixing things in a couple of emails to me. As
you might guess, I haven’t heard back from them since. I don’t really expect to,
either. While the wireless widget does work with my CG5, it won’t work on the
mount I bought it for, so I feel like my
pocket has been picked by the danged rascals. I’ve got used to connecting NexRemote through the hardware hand
control, but that doesn't mean I have to like it.
Should you opt for an Advanced VX instead of a CG5? The CG5 is, after all,
a modern classic given its modest price and outstanding performance. Nevertheless,
I think the VX is the way to go now. Even if it weren't getting almost
impossible to find a new CG5, the VX is a better finished, somewhat more solid
mount. How about the competing mounts from iOptron? I haven’t used one of the
new ZEQ25s or, indeed, any of that company’s GEMs. I’ve heard they are good performers, but using one would mean giving up the VX’s incredible NexStar goto accuracy. Not to mention, muchachos, that
dagnabbed AllStar alignment, which your mercurial old Unk must now admit he likes.
Nota Bene: I have in my hands Rock Mallin’s latest creation,
the Mallincam Micro EX. I had high hopes of
reporting on it here this week. Obviously, with the cancellation of the CAV run,
that didn't happen. Rest assured, as soon as I can get the cam out under a dark
sky, you will hear all about it. I did fire it up in the house, and your
techno-challenged old Uncle was able to figure out how to work it without much
trouble, which bodes well.
Nota Bene 2: While bagging up stuff to throw out as we prepare to move, I ran across a long-lost set of pictures, including a few from the 1994 Deep South Regional Star Gaze. So, I updated my article about that event with some of the pix and some additional text, even. See it rat cheer.
Nota Bene 2: While bagging up stuff to throw out as we prepare to move, I ran across a long-lost set of pictures, including a few from the 1994 Deep South Regional Star Gaze. So, I updated my article about that event with some of the pix and some additional text, even. See it rat cheer.
2018 Update
What has changed over the four years since this article hit the streets?
We did indeed move out to the suburbs, to the above mentioned Hickory Ridge. While I still sometimes miss the Old Manse (long since sold), having a modern home that's easier to keep up and being able to observe in the backyard on those (increasingly rare) clear nights means I don't miss it that much.
It turned out I was to have another year, 2015, of Chiefland trips. Various changes have kept me away from that storied old observing field since then, however. Most of all, things just aren't the same as in the the fabled Tom Clark days, and it looks increasingly doubtful as to whether I'll ever make it back, even for an organized star party.
The Winter Star Party was held there this past February (under unrelenting clouds), but as far as I know there was no fall star party this year. And it looks like the WSP will be back in the keys for 2019. Above all, while a star party at CAV would be nice, my last visit was to the 2015 fall event, and that didn't go very well--I didn't have a very good time, anyway.
The AVX? Its replacement worked marvelously and has continued to work marvelously. My main complaint, the new hand control? I eventually made friends with it. As I did with the AllStar polar alignment routine. I had to admit that after I got some experience with it, AllStar did work well despite requiring quite some time to perform. You have to do a goto alignment before AllStar, and (despite what Celestron's literature might lead you to believe) follow it with another goto alignment. Anyhow, I've switched over to Sharpcap for polar alignment, lining up on the pole with my guide camera. That is far more accurate than AllStar ever was.
I don't miss NexRemote anymore either. The coming of the Celestron StarSense alignment camera pretty much made it obsolete. Oh, it was sometimes nice to have a way to slew/center the scope wirelessly, but that just is not a big deal for me. I align the Advanced VX with the StarSense and send it on gotos with Stellarium/StellariumScope. Simpler is better for me at this time, and as much as I loved NexRemote, the StarSense camera is simpler.
The AVX mount itself? I spent some time refining my PHD settings and doing a PPEC run, and easily brought its periodic error total down to 1" or less--more than good enough for me.
What has changed over the four years since this article hit the streets?
We did indeed move out to the suburbs, to the above mentioned Hickory Ridge. While I still sometimes miss the Old Manse (long since sold), having a modern home that's easier to keep up and being able to observe in the backyard on those (increasingly rare) clear nights means I don't miss it that much.
It turned out I was to have another year, 2015, of Chiefland trips. Various changes have kept me away from that storied old observing field since then, however. Most of all, things just aren't the same as in the the fabled Tom Clark days, and it looks increasingly doubtful as to whether I'll ever make it back, even for an organized star party.
The Winter Star Party was held there this past February (under unrelenting clouds), but as far as I know there was no fall star party this year. And it looks like the WSP will be back in the keys for 2019. Above all, while a star party at CAV would be nice, my last visit was to the 2015 fall event, and that didn't go very well--I didn't have a very good time, anyway.
The AVX? Its replacement worked marvelously and has continued to work marvelously. My main complaint, the new hand control? I eventually made friends with it. As I did with the AllStar polar alignment routine. I had to admit that after I got some experience with it, AllStar did work well despite requiring quite some time to perform. You have to do a goto alignment before AllStar, and (despite what Celestron's literature might lead you to believe) follow it with another goto alignment. Anyhow, I've switched over to Sharpcap for polar alignment, lining up on the pole with my guide camera. That is far more accurate than AllStar ever was.
I don't miss NexRemote anymore either. The coming of the Celestron StarSense alignment camera pretty much made it obsolete. Oh, it was sometimes nice to have a way to slew/center the scope wirelessly, but that just is not a big deal for me. I align the Advanced VX with the StarSense and send it on gotos with Stellarium/StellariumScope. Simpler is better for me at this time, and as much as I loved NexRemote, the StarSense camera is simpler.
The AVX mount itself? I spent some time refining my PHD settings and doing a PPEC run, and easily brought its periodic error total down to 1" or less--more than good enough for me.
Sunday, March 23, 2014
Burnham’s
Unless you
are the greenest of greenhorn astronomers, the wettest behind the ears novice
imaginable, you know what I mean by “Burnham’s.” Burnham’s Celestial Handbook, muchachos. The three volume book once
considered amateur astronomy’s premier guide to the deep sky.
Naturally,
as the years have rolled on following the Handbook’s publication in 1978, books
that go deeper and have more deep sky objects in their pages, like Kepple and
Sanner’s The Night Sky Observer’s Guide
and Skiff and Luginbuhl’s Observing Handbook and Catalogue of Deep Sky Objects, have displaced it. As the 21st century bumbles on, even those guides
have been somewhat replaced—by computer programs, naturally.
The
situation with The Night Sky Observer’s
Guide and the Skiff – Luginbuhl book, is analogous to the one with printed
star atlases. The deepest print atlas, The
Millennium Star Atlas, shows one million stars and over eight thousand deep
sky objects. But… The freeware planetarium program Cartes du Ciel not only prints charts that are legible and usable,
if not nearly as pretty as those in Millennium, it blows the doors off the
printed atlas in object counts. A basic CdC installation might contain one
million deep sky objects and tens of millions of stars. A book of printed
charts can only go to deep and remain practical to use.
So it is
with observing guides as well. Deep sky “planner” programs like SkyTools 3, Deep Sky Planner, Astroplanner,
and Deepsky offer millions of
objects, and go beyond the bare facts of names, sizes and magnitudes. SkyTools 3, for example, says this about
M13 in addition to the “just the facts ma’m” data:
On this night NGC 6341 is best visible between 03:35 and
06:47, with the optimum view at 06:14. Look for it in Hercules, high in the sky
in moonlight. It is detectable visually in the Celestron Nexstar 11. Use the
Panoptic 22mm for optimum visual detection.
In the following 30 days this object is easy visually on
March 23 through April 13, with the best view coming on March 31. NGC 6341
passes high overhead at Chiefland, Florida. It is best viewed from mid May
through late October, with the best evening viewing in early August.
Most
planning programs also offer images and charts for every object in their
libraries (you may have to download the pictures of all but the brightest
objects, but that is easy). Deepsky, even
has extracts from the logs of renowned amateur observers like Barbara
Wilson. Overall, there is not too much even the best book can give you that a
planning program can’t. Well, that is almost
true. There is an exception: Burnham’s Celestial Handbook. It’s
different, going beyond facts and appearances and offering a unique,
aesthetically - oriented take on the sky that has yet to be duplicated by any
computer program or book.
Burnham’s is
different because its author was
different. There is no doubt Robert Burnham Junior was a genius at observing
and telescopes. Unfortunately, as is sometimes the case with people gifted for
a particular thing and also obsessed by that thing, that got in the way of a
successful life and career.
That isn't always true, of course. Clyde Tombaugh was probably an even more gifted
observer, but he was a different kind of cat, a down-to-earth farm boy who, in
the fashion of young Americans his time, the 1930s, was dead set on improving
himself. His exploits as a teen amateur astronomer got him a job at Lowell
Observatory, where he went on to discover Pluto, but that was just the
beginning. He soon got himself Bachelor’s and Master’s degrees from the
University of Kansas, went to work at White Sands Missile Range, and had a long
and distinguished teaching career at New Mexico State University.
Bob Burnham
was, yeah, different. Today, we’d probably call him “borderline autistic.” He
was extremely shy. Despite being a
huge name in amateur astronomy, he was almost completely unknown to us amateurs.
His reserve wouldn’t allow him to associate with us, much less speak at clubs
or star parties. Other than his writing in the Handbook, all most of us knew of him came from a sad letter he wrote to Sky and Telescope in 1982 bemoaning his treatment by his publisher.
Like
Tombaugh, Burnham came to the attention of Lowell Observatory as a young man—after
discovering a comet at age 26. He was
hired to assist in a particular project, the Proper Motion Survey, beginning in
1958. In addition to his work obtaining and blinking images for this massive study of
stellar proper motion, Burnham busied himself with several subsidiary and
(natch) esoteric interests, like collecting ancient coins. Shortly after coming to Lowell, he even discovered another comet (with his own 8-inch scope). Lowell was his life,
with the observatory even providing him with humble living quarters.
Bob Burnham
would probably have remained an unknown save for his Big Idea. He would write a
great guide to the constellations, to their stars and deep sky objects, for
amateur astronomers. Something like what Admiral Smyth and Reverend Webb did in
the 19th Century. It would go beyond anything that had come before, however, covering
deep sky objects, especially, in meticulous detail. The idea for what Burnham
originally called his “celestial survey” came to him before he moved to Lowell,
but as he settled in there, he began to work on it furiously.
Thus began Burnham’s
life’s work. His Celestial Handbook eventually went on to comprise three fat volumes
totaling over 2,000 pages. It was originally self-published in the form of loose-leaf
pages beginning in 1966. You subscribed to the Handbook and got pages as
Burnham finished them. This “book” wasn’t typeset; it looked as if it came
straight off Burnham's typewriter.
Most people
in the astronomy community, amateurs and professionals, immediately recognized Burnham’s
Celestial Handbook as a classic. Not everybody was completely thrilled, however,
at least not Burnham’s boss, Dr. Henry Giclas, who had hired Burnham and who was in charge of the Proper Motion Survey. Some
amateur astronomers want to paint Giclas as the villain of the piece, but he really wasn’t. By all accounts, he had a basically kindly
disposition and was well liked by his colleagues and the people of the
community. He doesn't seem to have had a very high opinion of amateur
astronomers, but that wasn’t an uncommon trait among professionals of the time.
Giclas was
irritated Burnham wouldn’t allow the Lowell staff oversight
concerning the Handbook. It was Burnham’s baby, certainly, but Giclas knew it
would become associated with Lowell Observatory, even if it didn't become an
official Lowell Observatory Publication, and he worried that any errors and
misconceptions it might contain would reflect poorly on Lowell.
The staff
was touchy in that regard, since Lowell Observatory had always had a reputation
for being a slightly goofy place. Actually,
while Bob’s book wasn’t perfect, it probably had no more errors than the
average undergraduate astronomy textbook of the day. Anyway, the Handbook was published in book
form without support from Lowell in 1979, and Burnham should have lived happily ever after.
He didn't,
and the rest of his story borders on the tragic. Who was responsible for
Burnham’s downfall? In the end, Burnham.
He knew from the beginning that the Proper Motion Survey would eventually be
completed. The friends he made at
Lowell urged him to get an education while he still had a job—he had never attended
college—but he was so wrapped up in his Handbook, his old coins, and the observatory’s
telescopes that he made no plans for the future that was rapidly
approaching.
The Proper
Motion Survey was done in the spring of 1979, and there was no money to keep
Burnham on as an observer or assistant. He was offered what was supposedly the only job available,
that of observatory janitor. Not surprisingly, he refused and left. How would
he support himself? With royalties from the Handbook, of course.
Should
Lowell have found something else for the man who’d worked for them for 20
years? Yes. There is no indication Burnham was anything but a good employee who
did what he was told for two decades. Yes, I know Lowell had a history of money
problems, and I know the NSF grant that funded Burnham ended with the Proper
Motion Survey, but I still refuse to believe something better than fracking janitor couldn't have been found for the man.
On his own and jobless, Burnham was
unrealistic about the amount of money the Handbook would bring in. As with any hardcore
amateur astronomy book there was a limited audience for it, no matter how good
it was, and thus little money to be made from it. Even today, with there being considerably
more amateur astronomers than there were in the 1980s, few of us astronomy
writers—if any—can support ourselves with just our writing. Also, not only was the
Celestial Handbook what the publishers call a “specialist book,” it was huge and
not very pretty—Burnham’s publisher did not typeset or redesign it; apparently
they just printed it from dupes of Burnham’s original pages.
There was
likely no way the Handbook’s royalties could have supported its author for long,
even in modest fashion. Not even if it had been in the hands of a mainstream
publisher, which it wasn’t. Unfortunately, apparently the only outfit who would take on the
book was Dover Publications, who specialized in reissues of other publishers’ unwanted
books and books in the public domain.
Dover actually
sold quite a few Handbooks at first, a surprising number, and Bob received some
reasonably fat checks for a while. As they inevitably do, however, the
royalty checks began to shrink. Despite that, he wouldn’t even consider looking
for non-astronomy work. He lived with a sister for several years;
always hoping his book would break big—maybe in international editions—and
bring him the money and recognition he craved.
The opposite
happened. Dover decided the way to move Burnham’s
Celestial Handbook was through the old Astronomy Book Club, who offered it
for years, usually as part of their membership sign-up come-on: you could get the three volumes of Burnham’s Celestial
Handbook for five bucks if you joined the club.
Not
unexpectedly, the book club deal further reduced Burnham’s royalties and he
began to sink further into poverty. The Astronomy Book Club did keep the book and
Burnham’s name before the amateur astronomy community, however, and that could
have been a big help if he had continued writing. In an ideal world, Bob would
have followed the Handbook with another astronomy book, piggybacked on the
popularity of his original work, and kept on trucking.
Unfortunately,
Burnham didn't have another book in him, at least not another astronomy book. As
far as I know, he never even contemplated a follow-up to the Handbook. He did
begin a Lord of the Rings-style epic
fantasy novel, The Chronicles of
Deriyabar, but it’s unclear how far he got with it, and Dover certainly
wasn’t interested in such a thing.
I believe
Bob Burnham could still have been helped at this stage. There is no doubt in my formerly military mind that he could have
got work with the astronomy magazines, done the star party circuit, and begun
to enjoy the accolades due him from his fellow amateurs. All that could have
happened and would have improved his life immeasurably, but Burnham was too shy
and isolated to reach out to anybody. He did the best he could, but was just too
dysfunctional to help himself.
He did do an
interview for Astronomy Magazine in
the early 1980s, but it had to be a self-interview;
he couldn’t face talking to a stranger from the magazine. The result was odd but nevertheless touching and
occasionally perceptive.
In 1986,
following disappointing returns from the Japanese edition of the book, which he
had counted on to turn his finances around, Burnham, whose physical and mental
health seemed to be deteriorating rapidly, left Arizona. Nobody much had any
idea where he was, what he was doing, or even who he was. Most of us amateur astronomers just naturally assumed the
author of the book we loved so much was the Robert Burnham who followed Richard
Berry as Editor of Astronomy Magazine
(a different and unrelated person). Not hardly.
Bob wound up in San Diego selling his paintings of cats in Balboa Park to
survive—barely. He was still receiving royalties from Dover, but he’d taken
enough advances to reduce his checks to truly minuscule amounts. He was just another troubled semi-homeless drifter hanging out in the park.
Despite his circumstances, Burnham never lost his love for the night sky, and would
occasionally visit the lectures and other events held by the San Diego club,
the San Diego Astronomy Association. No one there had any idea who he was, of
course.
The
denouement was that Robert Burnham died on March 20, 1993 at the age of 61, just
another charity case in San Diego’s Mercy Hospital, after being found in
distress in the park. His death was basically due to years of privation and
neglect.
It was years
before even his family knew of his passing, and more years before amateur
astronomers learned the man who wrote Burnham’s
Celestial Handbook was gone. Most of us didn't know a dadgum thing about Bob
Burnham till an Arizona New Times
(newspaper) article by Tony Ortega, “Sky Writer,” appeared in 1997 and slowly
got passed around the community.
How about
Unk and the Handbook? What’s my history with it? I’d noticed the little ads for
Bob’s loose-leaf version in the magazines, but I didn't get around to buying his
book until it had been out in three-volume form for a few years, in the
mid-1980s. How did I buy it? I am embarrassed to say it, but I did the
“Burnham’s for Five Bucks” thing with the (now long gone) Astronomy Book Club. I
plead innocent, since in them days I didn't know pea-turkey about book clubs
and publishers and the rights authors ought to have.
What did I
think? The minute I opened Volume I,
Andromeda to Cetus, I was hooked and knew this was a different sort of astronomy
book. The Handbook is inscribed, “The CELESTIAL HANDBOOK is affectionately dedicated
to all the young friends who have traveled with me to the far reaches of the
Universe.” Then comes a poem, a poem by Robert Burnham, “Midnight,” overlaid on
a nice black and white comet photo (no color inside the Handbook anywhere).
I’ve sat in
enough graduate English courses in the years since to know “Midnight” really
isn't much of a poem. The verse is awkward and the syntax and vocabulary
antiquated, but to me it is good—maybe even great—nevertheless: “Look skyward
now…/and see above…INFINITY/Vast and dark and deep/and endless…/your
heritage/Silent clouds of stars.”
That is what
Bob’s Handbook is all about; he strives to go beyond the nuts and bolts of
observational astronomy to deeper layers of meaning beyond. That is only half
the equation, though. What makes it
useful not just for contemplation in a warm den, but for observing on a cold
field, is that it is simply and sensibly laid-out and filled with information
about its objects.
After an
introduction and a couple of chapters outlining the then-current state of knowledge
in the science of astronomy, we are given the night sky constellation by
constellation. Each constellation “chapter” begins with a list of notable
double and multiple stars and a similar list of variable stars. For the larger
constellations, these star lists can obviously run on for quite a few pages.
What comes next is the meat of the book, the good stuff, beginning with a list
of the constellation’s best star clusters, nebulae and galaxies. Don’t expect
tons of objects. What you will find are brighter NGCs with a few ICs and a few
representatives from other catalogs thrown in. Andromeda, for example, has a measly
twelve fuzzies.
If that were
all there were to the book, relatively short DSO lists that include only object
designations, types, a description code not unlike that of the NGC, and an RA
and declination (1950), there’d be no reason to pick up Burnham’s today. The
simplest planning program would smoke it. What makes the Handbook valuable still
is the descriptive notes that follow the lists. These “notes” are discussions
of the constellation’s most prominent objects.
Each set of
notes includes not just a description of a star or deep sky object, but its
observational and cultural history, some of the science behind the object as it
was known to Burnham, and usually an idea of what it looks like in amateur
telescopes (which back then were often of 6 – 8-inch aperture). The notes on
the showpiece objects can be extensive, with M31’s going on for 22 pages.
While
Burnham usually (but not always) gives a good description of what an object
will look through your telescope, that is only part of the draw. In the
descriptive notes for Antares, Alpha Scorpii, for example, Burnham pulls together not just the threads of
ancient Chaldean and Egyptian astronomy, but of literature, quoting Byron, “The
mind that broods o’er guilty woes/Is like the Scorpion girt by fire.”
Even if I
don’t always get a clear picture of what Burnham’s favorite objects will look
like in my eyepiece, I always learn something from him, and often as much about
life down here as about the objects up there. Bob Burnham tended to cut himself
off from his fellow humans, but it seems his love for the stars gave him real
insight into humanity.
What else?
There are pictures. You hear complaints about reproduction quality, but it is actually
pretty good. Black and white, yeah, and on paper just this side of pulp, but
clear and most often useful. Many of the images were taken with the Lowell
13-inch camera, but there are other sources as well, including numerous shots from
Mt. Wilson/Mt. Palomar instruments. In general, the astrophotos, including the
amateur pictures, in the Handbook are state of the art for the 1970s. There are
numerous other illustrations, too, most of them good. Finally, there is an
index at the end of Volume III, but it is clearly an afterthought and not very
extensive or useful.
Many was the
cloudy night in the 1980s and well into the 1990s your old Unk spent with
Burnham’s, a pencil, and a steno pad making my low-tech observing lists and
hoping for clear skies. Burnham’s was more than that to me, though, much more.
It was a friend who saw me through hard times. Like when Daddy, The Old Man,
was in the hospital for the last time battling the cancer than took him way too
early. I sat in the waiting room reading Burnham’s, taking solace somehow in
that lonely man’s love for the eternal stars.
Today, Burnham’s Celestial Handbook has many fans in a small amateur astronomy sort of way, and some of them keep hoping it will
be updated. (Lowell astronomer) Brian Skiff was, I understand, willing to
take on that task at one time. Problems concerning the book’s publication rights
scotched the idea, however. Burnham’s doesn't need to be updated, anyway. The
science section at the front of the book was always its weakest part and is
easy to skip. Some of Burnham’s object information in the Descriptive Notes
sections is also outdated, but usually doesn't cause much harm for the observer. Finally, while
the object positions are for Epoch 1950, it’s easy enough to get right
ascensions and declinations elsewhere.
To be
honest, I don’t want to see the
Handbook updated. This special book has meant the world to me over the years,
and I want its look and voice to remain the
same. Which doesn't mean I’d been using the Handbook frequently of late. Until
recently, I thought I’d outgrown it. Hell, it don’t even have the PGCs. Until I picked it up again the other day and
started leafing. I ain’t outgrown it.
Not hardly. How could you outgrow Shakespeare? Or Melville? Or Cervantes? And
Burnham’s Celestial Handbook is our, amateur astronomy’s, Shakespeare and
Melville and Cervantes.
What of
Robert Burnham Junior? He is known and admired by far more amateur astronomers today
than when he was alive. There’s a memorial, a small plaque, at Lowell
Observatory, and an asteroid, 834 Burnhamia, was named in his honor. But his
true memorial is his Handbook, muchachos, which I believe will live on just as The Cycle of Celestial Objects and Celestial Objects for Common Telescopes
have lived on—and Burnham’s is a far better book than either. Do I have to tell
you to go out and buy a copy if you don’t have one?
Next Time:
Down Chiefland Way…with the Mallincam Micro EX...
Sunday, March 16, 2014
ISAN 2014 and How Do You Video II
Boomer on her AZ-4 |
This is
actually a semi-twofer, muchachos, since before I get to the main topic, Part Two
of the Getting Started in Deep Sky Video article,
I’d like to talk a little about ISAN 2014. International Sidewalk Astronomy Night, that is. The
evening when amateur astronomers all over the world set up their telescopes in
public areas to show off the night sky. ISAN is different from normal public
outreach in that we go to the people on this evening rather than having
them come to us.
ISAN has
become more and more popular over the last few years, but this year’s
edition, scheduled for Saturday evening, March 8, would be extra special. The
San Francisco Sidewalk Astronomers, the originators of ISAN, wanted it to be in
part a memorial for one of their departed members, famous telescope maker and
astronomy popularizer John Dobson, who died on January 15 at age 98.
The Possum
Swamp Astronomical Society has been participating in ISAN for five years now, and sure didn't want to miss this one. Not
only was this to be a remembrance for a man we revered, ISAN is fun. Being freed from the logistics of
setting up a public outreach event allows us to focus on enjoying showing the
sky to the public. We just take our scopes to where the public will be and have
a good old-fashioned “happening.”
The place for
our 2014 ISAN would be the same as in previous years, the Eastern Shore Centre,
an open air shopping mall across Mobile Bay from the Swamp. The Centre has a nice central
square/fountain area perfect for setting up scopes. There are lights
aplenty, sure, but when you’re doing sidewalk astronomy you don’t let light
pollution get in the way; you go after the bright stuff. We got the go-ahead from Centre management for this
year’s ISAN edition, and kept our fingers and toes crossed regarding the weather
forecasts, which were mostly of the “partly cloudy” variety.
Saturday
afternoon, the sky was, surprisingly enough, almost solid blue. Time to get the
public outreach rig loaded. If you’ve followed this blog long, you know I’ve
struggled with “Which scope for the public?” for many a long year. I’ve finally
settled (for now) on two. The RV-6 Newtonian for my students/older kids/adults,
and a C8 for younguns/general audiences.
The C8 OTA
in question, "Boomer," a 1984 model that began life as a Super Polaris C8, rides on
the simplest mount I could find for her, a Synta AZ-4. That’s a one-armed,
non-computerized, uber-manual fork.
No batteries, no cables, no alignments. Yeah, no goto either, but I’ve found I don’t need that for public outreach. What Mom and Pop and Bud and Sis,
want to see is the Moon, a planet or two, and maybe a bright star. At some
public events, I’ll show off a bright deep sky object or three, but at the
heavily light polluted Eastern Shore Centre, that is purty much a waste of
time.
iPhone Moon... |
I was
feeling right good about our prospects for doing some sidewalk astronomy till
the phone rang Saturday afternoon. It was my old buddy Pat Rochford wondering
whether I was still planning to do ISAN. “Huh?” said I. “Cloudy over here,” said Pat.
Since it looked so good in the Swamp, I just couldn’t believe we wouldn’t get a
few sucker holes, so, come five, Dorothy and I hopped in the 4Runner and made the
half-hour trip east to the mall.
Since we
were onsite a little early, we spent a few minutes browsing the Barnes and
Noble bookstore. Unk admired a couple of graphic novels, but since the suckers
didn't have the one I wanted, Batman:
Night of Owls, I left empty-handed. It was now time to get set up, and D.
and I got everything from the truck to the fountain (which was shut down and
dry; apparently, they don’t turn it on till spring) in just two trips: scope,
dew shield, mount, tripod, eyepieces, etc., etc.
Looking up,
the sky certainly wasn’t pristine, but it was more than good enough to show off
Luna, who was shining bravely through a thin veil of clouds. As we were getting
Boomer ready to go, we were joined by fellow PSAS member, Taras, and his
10-inch discovery Dobsonian. Not long after, Pat and his 8-inch Dobbie and PSAS
President Martin and his Meade LX90 SCT showed up.
How’d it go?
Purty smooth. We didn't get many takers at first, but as early diners
began leaving the nearby Wintzell’s (local seafood) and California Dreaming (nice
chain eatery) restaurants, we were able to give lots of little families looks
at the Moon. Did we do anything different this time? Not really. As usual, I
operated the scope (“Hold on a second, Coach; let me make sure the Moon is
still in there.”) while Dorothy gave out kid-centric literature and stickers
courtesy of NASA/JPL.
Unlike all
too many Uncle Rod expeditions, there were neither minor hiccups nor major disasters
this time. The closest thing to a bummer was that Martin’s LX90’s electronics
had died the previous evening, but he was able to press on manually. All told, we probably showed
close to 100 folks the Moon and Jupiter on a night that was occasionally mostly
cloudy. Best of all? We had one hell of a lot of fun doing it.
Our set-ups with California Dreaming in the background... |
By 8 p.m.,
three things were evident: more clouds and thicker were on the way, it was
getting chilly, and most of our “customers,” the little families, were now beginning
to drift on home. Sounded like Big Switch time to Unk. I snapped a couple of
afocal shots of Luna with my iPhone and called it a night. Dorothy and I packed
up Boomer post haste and made a beeline for California Dreaming, where Unk
treated himself to a nice rib eye and multiple
pints of Blue Moon.
How Do You Video Redux…
Okay…where
was we? Oh, yeah…we’d mounted the Mallincam video camera on the telescope, hooked
the camera to the computer, and plugged the video output cable into the monitor
and DVR. What’s next? Getting goto aligned. I habitually do that with the
Xtreme, since the camera’s field is equivalent to that of a medium power eyepiece,
and is just about perfect for alignment accuracy. One super cool thing for
alignments? Most of the Mallincams will allow you to superimpose a set of
crosshairs on the screen. If you are controlling the camera with a computer,
that is as simple as checking a box in the control program.
To get
started, light off your monitor if you haven’t done so already and apply power
to the camera, plugging it into its battery or AC power source. It should be
obvious if the monitor is picking up video from the camera; it will go from
dark to a gray screen, maybe with a hot pixel or two in evidence. At any rate,
when you turn on the camera you should notice a change on the monitor.
If you are
using a PC, boot it now and light off the Mallincam control software before you
begin goto alignment. If this is the first time you’ve used the software, you
need to set it up, which involves telling it which serial com port you will be
using to communicate with the camera. To see the com port number the laptop’s USB
– serial cable has established, look in Windows Control Panel and Device
Manager. In the device “tree,” you will see an entry for “Com and LPT ports.”
Click that and the com port number will be revealed.
Original Mallincam software... |
When you’ve
got that number, go to the “Config” tab in the Mallincam program. If you are
not using the original M-cam software, but one of the newer softs like Miloslick,
the screen will be different from the one shown and talked about here, but you
should have a similar settings screen. If you are using the original software, please note that when you start it up for the first
time you will likely get an error telling you the program hasn't picked up a com port.
Just acknowledge that and go to Config.
Com port
entered in the Config screen, go to the “advanced” tab on the original Mallincam
software or a similar camera control screen on the newer program(s). One that
allows you to set exposure, gain, and other parameters.
When you first go to the Advanced tab, you'll see most items are grayed out and a yellow “light” in the upper left portion of the window is illuminated. There will also be a “safety” timer counting down from 3-minutes. This is to prevent crashes when some camera settings are changed. You can override this safety timer, but you should only do so if you really know what you are doing. Otherwise, wait 3- minutes.
After the timer has run out, you can change settings. At this time, all you will be interested in is short exposure and crosshairs. On the upper left, you’ll see a “Sense up” section. Set the pull-down menu there to 128x. That will give you exposures of approximately 2-seconds, which is enough to show plenty of stars, but not so long as to make star-centering and focusing a pain.
When you first go to the Advanced tab, you'll see most items are grayed out and a yellow “light” in the upper left portion of the window is illuminated. There will also be a “safety” timer counting down from 3-minutes. This is to prevent crashes when some camera settings are changed. You can override this safety timer, but you should only do so if you really know what you are doing. Otherwise, wait 3- minutes.
After the timer has run out, you can change settings. At this time, all you will be interested in is short exposure and crosshairs. On the upper left, you’ll see a “Sense up” section. Set the pull-down menu there to 128x. That will give you exposures of approximately 2-seconds, which is enough to show plenty of stars, but not so long as to make star-centering and focusing a pain.
At the
bottom left of the window is “Crosshairs.” Check the box there and, assuming the PC
is communicating properly with the camera, crosshairs will be drawn on the monitor.
You can also choose “crossbox” if you like—which puts a little box at the
junction of the crosshairs.
Once you’ve
got the above sussed, the rest of the goto alignment is purty much as per normal.
You’ll just be observing stars on the monitor rather than in an eyepiece. If
this if the first time you’ve used the camera with the scope or scope/reducer
combination, your focus will likely be WAY off, but you should still be able to
detect a bright alignment star. When you’ve centered the star in the crosshairs
of the telescope’s finder, look for a big out of focus disk on the screen.
Increase the monitor’s brightness contrast if necessary till you see it. Then,
begin adjusting focus until star one is as small as you can get it. When it is,
center it in the crosshairs with the scope hand control.
Center
however many other alignment stars your scope/mount requires. When the last one
is done, take a critical look at focus. At 128x and the default gain of the
camera (which will be on the high side), you should see plenty of dimmer stars
onscreen. Are they pinpoints? If not, touch up focus. This will get your focus
close, but maybe not quite dead on. There are two ways to get precise focus.
Advanced tab... |
One is to
use an aid like a Bahtinov mask. These focus masks, which go over the front
aperture of the telescope, are inexpensive to buy and simple to make. One will
produce a series of spikes around a bright star. Adjust focus until these
spikes are arranged as per the instructions that came with the mask. When
that’s done, focus should be right on. Just remember to remove the mask when
you are finished. Don't be like Unk, who invariably forgets that step and starts
cussing M13 for looking so fraking funky.
If you don’t
want to use a focus mask, salvation comes in the form of a bright globular
cluster. Most of the year a good one will be somewhere in the sky, and a glob’s
tiny stars are perfect for focusing. Going to one also provides a quick check
of the quality of your alignment. When the scope stops and the camera’s
exposures “catch up,” center the glob with the hand control if it’s not in the middle
of the screen and have a look. A bright Messier should be visible and showing a
few stars at 128x, but if it’s on the dim side, up the exposure to 7-seconds.
How you do
that will depend on which Mallincam you own. If it is an Xtreme or one of the
other cameras that allow computer control of long integrations, just select
7-seconds on the integration control about halfway down the window on the right
side. Other cameras may require you to set longer exposures with a wireless
remote or via toggle switches on the camera itself. Once you’ve selected
7-seconds, the Mallincam should begin doing repeating 7-second exposures.
At
7-seconds, a good globular will be bursting with stars. What you’ll do is
observe those stars, especially the ones close in toward the center. Twitch the
focus control a small amount, and then wait for another exposure to complete.
Right direction? Need to go the other way? Adjust focus in this fashion until
the tiny stars are as sharp as you can get ‘em. Given the small chip/large
pixel nature of deep sky video cams, good focus is important for good-looking
pictures.
Focus attained,
let’s stay on the glob for a bit while we set the camera up. To start, we’ll
mess with three adjustments: gain, gamma, and color balance. “Gain” is much like the ISO setting on a DSLR
or other digital camera. It determines the sensitivity of the chip. The higher the gain, the more sensitive to
light the camera will become. Alas, there ain't no such thing as a free lunch (TANSTAAFL), and images will become noisier as
gain goes higher. In addition, any light pollution present will be more
noticeable as a bright background in the video with higher gain settings. So what
should gain be? I am mostly after lots of detail and dim objects, so I
habitually run at “6.” My buddies who are more interested in pretty video are
typically at 3 or 4.
The bridge of the starship U.S.S. Possum Swamp... |
Let’s set gain. In the AGC section on the Advanced tab screen, click “Manual.” Then, enter the gain setting you want. Type the number
in the box next to “Manual;” don’t use the up/down controls. When you change
gain, the camera’s safety timer will engage. If you use up/down, each click
will require a 3-minute wait. Just type in the gain (I suggest 4, 5, or 6 to begin)
and you’ll only have to endure one 3-minute time-out.
Next is “gamma,” which is sorta like a
brightness adjustment. The control near the top of the screen has two settings,
.45 and 1. 1 will give a darker picture, .45 a brighter one. The way I work,
with relatively short exposures (28 seconds or less) on dim objects, .45 is
best for me. With a brighter object/longer exposure, “1” can make pictures look
better. I recommend beginning with .45 until you have a feel for the camera’s
settings and how they interact.
Finally, there’s
white balance. It’s not overly
important except on brighter objects, and especially nebulae. I leave it on
“ATW,” automatic white balance. If white balance is “wrong,” pictures can have
a pink or blue cast. If colors do not look right, select “Manual” and adjust the
red/blue controls.
Don’t have a
computer to control your Mallincam? Don’t want one? You can set all these
things (except long exposure integrations) with the buttons on the back of the Mallincam
or with a wired remote. Mashing the buttons causes menus to appear on the
monitor. I don’t like to work without a computer, so I am not an expert on these
“OSD” menus, but they've been easy enough for me to use the couple of times
I’ve resorted to them. You can find a good description of these menus in this .pdf document from U.S. Mallincam distributor
Jack Huerkamp’s website.
You’ll likely
find, as I did, that learning to use the Mallincam is a little like learning a
musical instrument. There are many settings and they can affect each other. It will
take some practice before you begin getting the images you want—but, believe me,
you will.
Next? You
get to work on the deep sky, of course. You start having fun. You’ll develop your own procedures, but this is how Unk does
it. After I am aligned and the basic camera settings are laid in, I fire up SkyTools or Deep Sky Planner on the laptop and have a look at my observing
list. I tend to work one constellation at a time rather than jumping around the
sky. Once I’ve identified the first object, I’ll look out of the EZ-up to make
sure the telescope is clear—of wandering people or other obstructions—and issue
the first goto command.
Focus target... |
When the scope
stops, I’ll usually up the long integration duration to either 14 or
28-seconds. Given my other settings, 14-seconds yields good images even under
less than perfect skies, and I will often leave the gain there all night. If I
am after the very faintest details and the sky will permit it, I might go to
28-seconds. I will usually only go longer than that if I am after a pretty a picture
and need good color saturation and image smoothness.
“How about
filters, Unk?” I used to preach against them, since most light pollution
reduction filters make longer exposures necessary and shift color balance.
Lately, though, I’ve been using a mild filter an Orion Skyglow Astrophotography Filter. It lets me do good work in bright skies
and doesn't change the color balance much. I frequently use it when I have to image
an object down in the Possum Swamp light dome. The Orion has worked well for
me, but it’s a wee bit expensive, and I suspect any mild filter—like a Lumicon Deep Sky, for example—would do as
well.
What else?
As I mentioned in the previous installment, I record my video on a DVR since I
like to view my results on the big screen TV, and sometimes process video in
the computer. The Orion StarShoot DVR’s screen is way small, so I use both a monitor and the recorder. I soon
discovered the Mallincams don’t have enough “drive” feed both a monitor and a recorder
at the same time using a splitter, however. Video quality suffers. I could use
a video amplifier, I reckon, but I owned a cheap solution already, an old
composite video switcher left over from the analog video/cable/TV days.
I center the
object on screen with the HC if necessary and evaluate it on the monitor. If it
doesn't require any changes to exposure or gain or somesuch, I mash the
switcher to send video to the DVR. I then push the button on the Orion DVR’s
wired remote, which turns on the recorder and begins recording. The StarShoot will
record an audio track from its built-in microphone, so I speak my notes into
the DVR as I “tape” the video. The Orion also records a time/date
display in the upper right hand corner, which often comes in handy. Pretty
dadgum slick, all said.
One question
I’m sometimes asked has to do with the Mallincams’ ability to output S-VHS
video, Super VHS video, which is somewhat higher in quality than normal
composite video. My experience is that if you are focused on broadcasting on
Night Skies Network or doing heavy computer processing of images, S-VHS can
help a little. For just
viewing/recording video? Not so much. I never use it.
And then? On
to the nextun. If I am moving to a radically different part of the sky, I shine
a red light on the scope and watch for cable wrap. With all them wires going to
the mount and camera, that is always a distinct possibility. Anyhoo, I just
keep going, as I did back in the days of The Herschel Project, recording 50 or
100 or more objects over the course of an evening. That is not too many objects
by any means, not when you have the ability to give each one all the time it
needs at home on the TV or computer.
What else is
there to the video game? You may occasionally want to improve your videos by
processing them with a computer program. Or you may want to make still pictures
from ‘em. All that is another long story for another Sunday, muchachos. Now?
The night is old, the video is in the can, and Chaos Manor South’s warm den and
omnipresent bottle of Rebel Yell are calling.
Nota Bene: I’m sure all y'all have been watching the big show, but remember to let your non-astronomer friends know
about the new Cosmos series hosted by
Dr. Neil deGrasse Tyson. Dorothy and I loved it; it was clear Tyson’s heart was really in
it and he did a superb job. Good stuff.
Next Time: Unk and the BCH...