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Eyepiece Recommendation

Started by [email protected], 06/30/2006 05:31PM
Posted 06/30/2006 05:31PM Opening Post
Hi, all:

I'm in the need for a third (and final) set of eyepieces for my scope. My setup is:
12.5 f/6 homebuilt dob with DenkII w/2"OCS & Dual-Arm Power Switch with Low-Power S lens (whew!)
My eyepieces are the old 24.5 Meade SWA and a recent 15mm Expanse. I've been in this hobby for almost 14 years and have owned many Naglers, Pans, etc. but I find myself stuck on this one.

I've noticed in the bino that Naglers aren't really needed (I have long ago sold all of mine). I like seeing the field stop (preferably in th 60-68 degree range), since it gives the impression of looking out a big window. In a bino, a Nag tends to be too much FOV. The allusion of merging eyepieces makes a medium FOV extremely pleasant.

Last night I did the drift test to get the real magnification, and was surprised that the higher power topped off at 264X, about 40X less that the calculated from the specs. I'm looking for a recommendation for an eyepiece that is anywhere from 8-11mm's in a price range of 50-80 dollars. I know that's not much for price, but I've learned that simple, low-element design tends to yield the brightest and sharpest views, especially in a binoviewer which tends to correct any minor flaws.

I've looked at Antares, Orion, Meade, TV, UO, and I'm just uncertain. Any help would be greatly welcome. I'll also post this in the bino section too.

Thanks,

Guy

16" f/4.52 ATM Truss Dob, Discovery Mirror
Denk II w/nags junkie

Posted 06/30/2006 07:40PM #1
The RKE's already recommended are good. But only 45deg afov, but in truth it looks a tad more to me. I barely notice a difference between the 8mm RKE and the 8mm TV Plossl which is supposed to be 52deg. But RKE after the 8mm, only has the 12mm.

The Siebert Star Splitters have 60deg afov and very sharp field stop. Available in virtually any fl you want. But they are $99 which is a bit over your range. On the plus side though, since Harry Sibert makes binoviewers, I sure he would ensure you get a perfectly matched set. So something to think about. I have these eps and they are very sharp.

Finally, for the cheapie route, there is this oldie I came across in 10mm that really performs quite well. Called a "10mm MA Long Eye Relief" eyepiece. No name on it. People have it on Astromart. I recently put up an add for them and got a few people having them. So you could get those for about $25 each used from AMarters. Send me a private email if you want to know more about this and I can send you some pics.

Other than that, Siebert has what he calls "Performance" series which are $49 and supposed to be 65deg. I have no experience with those though. Call Harry and maybe he'll give you a 30-day back on these...I know he does on other products, just not sure on these.

-Bill