One thing you should check is the focus point for both eyepieces. I had to raise my primary mirror a bit with my collimation bolts to get the 31mm Nagler to...
... Hmm, that's interesting. If I still had a Sky Commander it'd be fun to play with duplicating this. It'd be difficult to take the EL green panel out and...
The top shelf of the PC-Podium is currently 14" wide x 12" deep. Presuming a 16" screen is the diagonal, and the aspect ratio is 5:4, then the width of the...
... (31mm, 82 deg) ... similar ... Jean-Paul, I have used the 31 "Terminagler" several times when borrowing it from a friend on my f5 dob. It is a wonderful...
Does anyone have any idea where I can buy a 36" or even a 40" mirror? I am serious. I have a chronic case of aperture fever. Thank you, Bill Mitchell Erie, PA...
Hi, I was on a star party in Sweden recently and saw this beautiful 17.5" aluminum dobsonian http://hem.passagen.se/razvan1/17%20i%20alu.htm. See the last 5...
Been there, seen that. Actually awaiting a reply from Steve now. Thanks Don. ... __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect...
let me know when you get an answer - assuming you DO get an answer. Although our desires may be a little different. Having a 30 now I would need to go to at...
gary, fred rockenberger has some nice, 48", 4.25" thick, pyrex, 390lb, cellular blanks. and hes right in phoenix. $ 3600 just for the blank, but you would have...
Those are pretty cool. I've been thinking of trying one of these blanks to see how it grinds and polishes. Probably wouldn't start with the 48 though. :) ...
Stabilite makes mirrors that large. Woden optics lists that size on their website. I don't know anything about them, so I don't know if the quality is...
Do not go with stabilite! Ray is a total con man who has cheated people out of $1/4 million so far, he got me fo $6,750. (criminal charges pending) ...
... 82 deg) ... I believe Marcus Ludes (owner of APM) has tested all of the Penax XW's, and of the lot, the only one he found serious optical issues with is...
Thank to all three of you who answered my question. I have decided for the Nagler 31. With the Parracorr I acquired last year, it should be an excellent...
Just as serious suggestion Bill have you thought about making an ultra giant binocular. You would end up with a telescope that is heaps shorter for a given...
Alas here is one doubting Thomas with monocular vision. Even 10x50s don't work with me let alone something bigger. Better check out with something cheap and...
Hi there Roger Your right there are some people that just don't have binocular vision, I didn't even realize that until I built these giants. We have two ...
Bill: I also have a chronic case of aperture fever. My question is do you intend to haul this around or you will keep in it one place. As far as I know; you...
I recently received my new Discovery 17.5 pdhq and when I slide the paracorr in it stops right where the filter threads begin on the JMI focuser. This was not...
You might contact JMI and ask them to swap out the threaded tube for a plain one. In my experience they are pretty responsive. I'm sure they would be willing...
I have been thinking of forming a group ownership in a larger instrument... placing it out here in SE Arizona in a roll off roof observatory (it is in place...
Gary, Rather then more complex optical systems, since you'll likely be on concrete, you might consider going with a normal newtonian system and using a...
good idea... impressive scope. g. ... and ... widely ... specially ... an ... while ... the EP ... placed ... outside ... dome), ... volt ... roof ... time ......
... more problems than I do in ... Charlotte. There's a 40" in Chiefland, FL. It's owned by Tom Clark, editor of Amateur Astronomy. He's been doing a series...
Nothing at all against what Tom has done but I would not want to mess with a thin mirror again... there is too much money involved not to go to a thicker and...
Al and David Nagler will be our seminar guests from tomorrow through Thursday. All are invited. regards Greg N Post message: C14@yahoogroups.com Subscribe:...
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