Excuse me for not knowing, but what is a GEG?


TIA,
Jim


-----Original Message-----
Date: Wednesday, December 01, 1999 10:05 PM
Subject: Re: [M]: Equipment for Beginning Astrophotography


>The Superwedge, GEG and ST-4 is what I would do.... wait a minute, that is
>what I did. :-)
>
>I tried for almost 2 years to get my guidescope to work with my 10"
>LX200. It worked OK up to about 20 - 30 minutes but no longer even with
>the mirror cell locked down and huge amounts of time and money and lost
>dark time working out the flexure bugs. It is better to get the right
>equipment right away and the above combination works great for me and
>several others who's images are better than mine.
>
>I'm thinking of getting a JMI NGFS for my CCD work, but for film I use the
>GEG because of it's huge focal reducer and very high quality workmanship
>and high quality unvignetted images I can get using it. Focus is tricky,
>but in my experience the focus drift as the temperature changes makes the
>NGFS accuracy mute for long exposures anyway. If the temperature is
>steady, or you are doing short CCD exposures I think the NGFS is a great
idea.
>
>Good luck!
>
>At 07:11 AM 12/1/99 -0600, you wrote:
>>Now that I've had my 10" f/10 LX200 for year, my
>>thoughts have been wandering towards
>>astrophotography. Fortunately, today I had a
>>$1500 windfall. I am debating over whether this
>>would be adequate for a start in astrophotgraphy.
>>I have considered something along the lines of a
>>Super Wedge, GEG and ST-4. This of course would
>>be for film photography. If I were going for ccd,
>>I'd like something along the lines of a 416, or
>>really an ST-7 - too much $$. My wife loves
>>astrophotographs (just bought one on E-Bay) so I
>>guess film is more likely to produce something
>>she'd hang on the wall.
>>
>>That said, what would you experienced
>>astrophotographers recommend as a good starter
>>kit? I know the wedge is a given. Probably
>>wouldn't want to wait on a Milburn. Some say the
>>GEG is better than a guidescope so you don't have
>>to worry about mirror flop, although I have a
>>TV-85 (8 lbs) that could be used. I guess
>>buying/making counterweights will need to included
>>as well. Is the guide scope + ST-4 and NGFS +
>>focal reducer + camera on the LX200 better?
>>
>>Apologies for sleeping through all the
>>astrophotography threads - it was all academic
>>until now. I've looked at a number of web sites,
>>but will appreciate any responses or URLs. Maybe
>>I can pull something off before before the $$ gets
>>spent on Christmas!
>>
>>TIA, Danny Cobb
>
>Chris Vedeler
>http://www.isomedia.com/homes/cvedeler/space.htm
>Tucson, AZ
>

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