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Posts Made By: John Roehrig

February 19, 2004 04:44 AM Forum: Equipment Talk

Your first scope ever?

Posted By John Roehrig

3" Newtonian - Sears, I think. Christmas present at about 10 years old. Cardboard tube, 0.965" EP, funkiest alt-az mount ever developed.

Started my lifelong interest in astronomy and was the forerunner to my current 12.5" StarMaster and AP Traveler. I think I'm at the end game!


February 19, 2004 05:02 AM Forum: TeleVue

Panoptics, Naglers, and Powermates

Posted By John Roehrig


There are some good choices out there for your scope. For widefield viewing the TV 55mm Plossl is a good choice that is not too expensive. In the 35mm range I found the Celestron Ultima to be very good (although it has a very long eye-relief that some people have trouble with). In the 30mm range, the Apogee 30mm Widescan performs quite well. In the 17mm range the TV Nagler 17mm T4 is excellent. It was my first "upgrade" EP, and I still have it. With your 8", f/10 scope I would not go lower than 9mm - the Nagler 9mm T6 is a good choice - or a barlowed 17mm. Besides considering a barlow, remember that you can also get an f/6.3 focal reducer/corrector which will have the opposite effect (reduce the magnification of your EPs). There is a great review on Cloudy Nights about this useful accessory.

Good luck!


September 4, 2004 04:06 PM Forum: Celestron

Beginners's problem with new C8 ASGT

Posted By John Roehrig


I would go over to the Yahoo Celestron AS-GT user's group to get the answers to your questions. There have been many discussions on alignment issues with these mounts. I have one and it works very well. You should be able to solve your problem.


March 1, 2007 03:56 AM Forum: Beginning Astronomy?

Telescope for low temperatures

Posted By John Roehrig

Thanks for the ideas. I'll pass them along.