Tuesday, October 28, 2008
The 8mm Ethos Faces Dark Skies
The weather along our often cloud-shrouded Gulf Coast had been lovely. Crisp. Almost cool. In October, for gosh sakes. Then, just before I was to head south to the storied CAV, the forecast icons on wunderground.com’s page began to change from happy little Suns and Moons to nasty old clouds.
Which was just what I didn’t need. After a punishing summer and fall at work, I was ready for a break, and the (new) Chiefland Star Party seemed the perfect place to get one. If you’ve been hiding under a rock the last decade or so, the Chiefland Star Party is a great big do under dark skies near the little Florida town of Chiefland. It's an event that has in the past attracted upwards of 300 deep sky-crazed amateur astronomers. Unfortunately, this much-loved venue had rapidly outgrown its facilities. There was no longer enough room for talks, vendors, porta-potties, or telescopes. For that reason, the CSP took a couple of years off.
For a while it appeared that “couple of years” might become “forever.” But the CSP was just too good to let it ride off into the Sunset, and it was to be back this fall with plenty of electricity, a more enclosed area for vendors, a better place to hold talks (than the old open-air pavilion) and, most of all, a new and much larger observing field. I was counting the days to 24 October and the beginning of Chiefland 2008, especially since I had an agenda.
|Tom Clark's shop, the Beast's dome, and lots of clouds.|
Suddenly, it looked as if that might not happen, at least not in the limited amount of time I’d be Down Chiefland Way. Due to my typically crazy schedule, I planned to arrive on the Wednesday prior to the star party (I am a Chiefland club member, so that would be permissible) and stay through only the first weekend of the week-long event.
When I went to bed Tuesday night, it wasn’t looking good. “Partly cloudy tonight” forecasts had been modified to “GOOD chance of thunderstorms all evening” for two of the four nights I would be in onsite. Nevertheless, the next morning I packed the Toyota and headed south. I’ve always had a great time at the CAV—rain or shine.
What did I take with me in addition to my two pretty new eyepieces? The telescope would be my time honored 12.5-inch truss tube Dobsonian "Old Betsy," who’s proved her mettle over 15 observing seasons. Why her instead of one of my CATs? I love my SCTs, sure, but nothing makes for a more impressive visual experience than the wide fields of a fast (Betsy's an f/4.8) Newtonian. I will also admit to y’all that after working on my forthcoming book, Choosing and Using a New CAT (November), for nearly two years I was ready for a short break from SCTs, much as I love ‘em.
As the afternoon wore on and I got closer to my destination, I did begin to notice an increasing number of fluffy-white members of the cloud tribe. These were still relatively small and few, though, and I reassured myself they were likely just “a few afternoon clouds off the Gulf.” By the time I’d checked into the Chiefland Holiday Inn Express (my usual campsite), and headed out to the CAV, though, the sky was degrading rapidly and there was now a feel in the air that hinted bad weather was on the way. The only question was "when."
Otherwise? Quite a few folks were on the old "club" field already, and it was obvious from the number of vehicles on the official star party site just to the west that the revived CSP was going to be a big one this year. I began to set up in my usual location on the club field, opposite the picnic pavilions and just down from the Clubhouse, which was the spot my friend Pat Rochford and I had used for years. As soon as he saw me on the field, however, my old buddy Tom Clark (of Tectron Telescopes and Amateur Astronomy Magazine fame), roared over on his golf cart and convinced me to move to right outside his shop and close to the dome of the 42-inch Beast. We—me, fellow astro-writer Steve Coe and a couple of other friends—would have a mini-star party of our own right in the Clarks' "backyard."
|And still more clouds.|
Tom and I unlimbered his fantastic 24-inch f/4.5, “Mini-Beast,” inserted the 13 Ethos, and got to work. Just as twilight ended, we thought to take a look at M22, which would soon be too low to fool with. Tom centered the big Sagittarius glob, and then squawked. Earlier, I thought I’d detected a little skepticism about the Ethoses from this Dobsonian guru, but it was clear ol’ T.C. was liking what he was seeing.
When I pressed my eye to the 13, I was ready to be impressed, but not nearly knocked off the ladder as I was. What was before me (that seems a more apt way of describing the Ethos experience than “in the eyepiece”) was an enormous globe of tiny, tiny stars. The big old grandpappy glob literally filled that enormous field. Again, as I have said before to all who will listen, it was not just the big field that was so amazing. Oh, that was part of it, but what was CRAZY was how sharp the image was. And how high the contrast was. With M22 not much above 25 degrees, I expected mushiness, but that was most assuredly not what I got. It was crisp, it was beautiful, and the stars were deadly-sharp pinpoints despite their low-altitude.
I was, frankly, also interested to see what the Ethos would be like in a fast(er) scope like this f/4.5. As you may know, not even Nagler and Ethos eyepieces will do anything to counteract coma. To “fix” this problem of faster Newtonians, to get them edge-stars back to being pinpoints instead of comets, you need a TeleVue Paracorr (or other coma corrector). Which we didn’t use.
I have heard some comments that coma seems worse with the Ethoses than with the Naglers, since the field is significantly larger. My verdict? That may be the case, but I did not find the effect pronounced or disturbing in this f/4.5. In fact, I didn’t notice much coma at all the whole time we was admiring M22. I just drank it in. When I did think to worry about the field edge, yes, it was there. Is the coma displayed in the 13 Ethos more obvious than that in a 13mm Nagler due to the 100 degrees of AFOV? Perhaps a little bit for some folks, but I didn’t find the overall coma level in the 13E more troubling than it was in Tom’s 13mm Nagler.
|The good, old Holiday Inn Express in its salad days.|
Could I still be happy with a 13 Nagler? Sure. I guess. The Nag’s a fine eyepiece, but it would be a long time before I would be able get those mind-blowing Ethos visions outa my mind and be able to truly love a Nagler again. It wasn’t just that way with magnificent M22, either. One showpiece after another was as beautiful as the last in the 13: M13, M92, M17 and on and on.
But that was the 13mm, and I’m sure y’all are tired of hearing me gush about it. What about the 8-mm? I had to wait to find out. My first evening at Chiefland started with a depressing number of clouds in the sky, segued into a truly inspirational sky tour with Mini-Beast and the 13mm, and descended into an unbroken morass of cloudy skies as the promised storm front began to push in around midnight. Didn’t I use the 8mm at all? I did, but poor seeing ahead of the storm did not allow it to shine in the 24-inch or in my 12.5-inch. No, I’d wait for good weather before seriously putting it through its paces. Surely I’d have the chance; I’d be at the site until the following Sunday. For Unk it was back to the Holiday Inn for whiskey, those wacky UFO Hunters, and hopes for better skies Thursday night.
|The "New Field," the star party, and still more clouds.|
As we went from clouds late Wednesday night to pretty-much torrential rain early Thursday morning, to leaden skies and occasional rain Thursday night, to more of the same all day Friday and Friday night, I admit I did begin to wonder whether I would get to try the 8mm at all this trip. The weekend was here, and other than those few hours Wednesday night I hadn't seen a blessed thing.
What did I do while waiting on a predicted front passage that seemed to keep being delayed? I spent quite a few hours sitting in Tom's shop shooting the breeze with him, Jeannie, and Steve Coe. Friday afternoon, Steve and I enjoyed an hour or two in Chiefland's one and only steak house, Deke's thanks to Amateur Astronomy Magazine's new editor's, Charlie Warren's, largesse, eating the insanely cheap and good fare and talking about the current state of the amateur astronomy biz. After a nice thick, juicy ribeye with all the fixings, I was definitely in a better mood no matter how the sky looked.
|The motel parking lot was on its way to becoming a lake.|
After spending the first part of Friday night sitting in Tom's shop twiddling my thumbs and sticking my head out the door frequently to look at the sky, I thought I had begun to notice a change in the weather. Ol’ cockeyed optimist me then predicted “some viewing” Friday evening, but I was proven badly wrong and had to endure some good-natured ribbing along the lines of, “You brought two Ethoses with ya? We know what attracted the clouds, then!" The only astronomy gear I tested Friday night was my new Astrogizmos red/white LED flashlight, which helped me find my way back to the Toyota in the dark as the rain began to fall. Again.
How about the actual, official Chiefland Star Party? I was registered, but did not spend a lot of time over there. I was having too great a time with my buddies at the Clarks’ and the rain and drizzle did not encourage tramping across the big New Field, anyway. I did note on my couple of trips that-a-way that the good folk there seemed happy—well, as happy as amateur astronomers get under cloudy skies.
The event appeared well-organized, and there were some welcome additions this year, including the presence of “Micki’s Kitchen,” the catering outfit that has been selling food at the Winter Star Party for a while. Jeannie Clark and I hoofed it over there one cloudy night in hopes of getting some of their famed chocolate brownies, but wouldn't you know it, they were sold out.
The ugly skies appeared to be keeping star party attendance down on Friday, but the large field had begun to fill on Saturday morning as more attendees rolled-in with the promise of clear weather. The weather reports were finally offering a near certainty for clear skies sometime Saturday night.
Yes, it appeared the heavens would finally open up Saturday night, if maybe not as quickly as we’d hoped. The cold front did not begin to move through in earnest until about 10 pm, but when it did, it did, and scopes were quickly uncovered both in our area, the Clarks’ backyard and the club field, and on the star party observing field itself.
Yes, the cover was finally off the ol’ Dobbie again, the Sky Commander was aligned, and I was ready to see what my other expensive glass could do. What to look at? With the sky not completely dark and a few clouds still hanging-in to the south and west, I turned to M2, the great globular cluster in Aquarius. What did I think? Beautiful in the 8mm. Just be-yoo-tiful. Oh, maybe not quite as cool as M22 had been in the 13 Ethos the previous evening, but, then, M2 is not the glob M22 is.
Is the 8mm perfect, then? No. No eyepiece is. Each is a compromise and the 8 Ethos (like the 13mm) is no different. Its faults? I had to look long and hard to find something to downcheck it on. I certainly didn’t notice any astigmatism. Nor could I detect any modicum of barrel distortion or “pincushioning” as I cruised rich Milky Way star fields. The only nasty negativism of note is that it is my impression than both Ethoses are prone to a bit more “blackout” effects than some of the Naglers. Don’t hold your eye in the right spot when viewing, and you do notice dark patches in the field, especially with a bright background.
In part this “problem” may be due in part to the fact that the Ethoses offer more eye relief, about 15-mm, than most ultrawides. That makes it—for me anyway—a little harder to position my eye properly. I did find leaving the eyeguard/cup up helped me get my eye in the right spot. I don’t normally use eye cups on eyepieces, but using one on the Ethos was not a problem. Even with it up, I could easily take-in all of that great, huge porthole. Now, don’t get me wrong about this: blackout is not a major problem with these oculars. Certainly they demonstrate far less than something like, say, the 35mm Panoptic (still a fave of mine, nevertheless). It’s also been my observation that it takes me a while to “learn” to use an eyepiece, and that once I do, things like eye-positioning begin to come easily and naturally.
|Lot's of folks rolled in for the star party.|
Wanting something a little prettier than the run-of-the-mill H400 galaxy, I punched NGC 7331, “Andromeda Junior,” into the Sky Commander. Not only was the main galaxy bright and detailed, the Deer in the Deerlick (Ask me what Steve Coe’s new nickname for this one is some time!), the little companion galaxies nearby, were as evident as I’ve ever seen them in Betsy.
Swinging over to M74, I was surprised to see this sometimes difficult spiral’s arms standing out like sore thumbs. I don’t think I’ve had as good a view of this challenging face-on spiral in the 12.5-inch since one special night at the Deep South Regional Star Gaze nearly 15 years ago. Heck, I didn’t think my eyes were still good enough to see something like this. What else?
M31 was riding high, why not? 8mm may sound like a lot of magnification to use on this elephant of a galaxy, but it really is not, not if you want details instead of just the big picture. As with M74, I saw more of M31 than I’d seen in a long time. I don’t know I’ve ever had as good a view of this monster with any scope. Start with the dark lanes. Two were starkly visible. The satellite galaxies, M32 and M110? M32 nearly ruined my night vision. M110 was large—huge—and I seemed to see some sort of fleeting detail near its core. Speaking of galactic nuclei, M31’s core on this evening in the 8 was not merely “star-like,” it was a tiny blazing pinpoint.
I also noticed that something I have had trouble with over the years, the galaxy’s enormous star cloud, NGC 206. It was not merely “suspected” or “visible,” it was bright and easy. My only regret is that I didn’t spend some time hunting down some of M31’s horde of globular clusters when I was in the neighborhood. Next time.
As often happens—to hapless me, anyway—the best skies came on the last night (for me) of the star party. Sunday morning I had to drive back home to Chaos Manor South where stacks of ungraded student papers awaited my attention. Reluctantly, I Desert-Stormed Betsy at about 1:30 in the am. Turned out I could have pressed on a while longer. When I got back to the motel, I found I just couldn’t sleep. My mind was too focused on the glories I’d seen, on the great expanses of The Andromeda Nebula I’d wandered across. Me and my Ethos.
Yes, over a decade later the TeleVues are still wonderful eyepieces. Would I buy another one, though? Probably not. Not long after the coming of the Ethoses, Explore Scientific debuted a line of 100-degree oculars. Are they as good as the Ethoses? In my considered judgment, no, not quite. But it is doubtful my aging eyes can tell the difference. And for those of us on semi-fixed incomes, the fact the ES oculars go for about half the price of the Ethoses has to be a consideration.
When I first started doing the Chiefland Star Party and the Spring Picnic not long after the turn of the century, I thought the CSP was destined to become "Texas Star Party East." 'Twas not to be. After going strong for about five years with the big fall star party and the almost as well-attended Spring Picnic, it faltered, becoming an on again/off again thing. Why? Maybe it was too successful. So many people were beginning to show up that the facilities, such as they were, were being stressed. What's wonderful for a small event or a monthly club gathering--a club house with two bathrooms, a covered pavilion, and electrical service suitable for a few RVs--just wasn't enough when the attendance boomed into the hundreds.
Also, as the second decade of the new century came in, many of the original Chiefland group who were the driving force behind the star party were no longer with us. Tom and Jeanie Clark retired to the southwest, Billy and Alice had passed away, and many others became less active and rarely present at the CAV. Yes, some new people stepped up to the plate, and for a while there was a revived star party with some new facilities and a spacious new observing field. It never really seemed to jell, however.
Finally, the weather just isn't what it used to be. Even the summers used to offer clear nights in Chiefland. That's now rare to the point of extinction. And conditions aren't, in my opinion, as good as they were ten years ago in the other seasons. A recent Winter Star Party was held at the CAV under resolutely cloudy skies.
One thing? What began at this star party. I suspect one reason this article has always been a favorite of mine is that this marks the real beginning of the Herschel Project. Ostensibly, it began here, but in retrospect, these nights under the CAV skies are what planted the seed of the that monster undertaking.