RE: [M]: 216XT guiding limits
| Subject: | RE: [M]: 216XT guiding limits |
| From: | Alan Voetsch |
| Date: | Mon Jun 05 12:16:58 2000 |
Hi George,
I might be able to help. I use a 201 and had the same problem.
Start with a bright star. Achieve best focus. Decrease exposure time if
needed. A new dark frame must be taken every time you change exposure times.
Repeat until you achieve perfect focus.
Remember, brighness values change a lot with very little movement of the
autoguider especially near perfect focus. You must be able to repeat this
position so use a focus ring or whatever to do this. I spent many hours
getting focus and never would have done it without the help of great
articles by Guido Pasi & Michael Hart located in the mapug archives. Good
luck.
Alan
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I might be able to help. I use a 201 and had the same problem.
Start with a bright star. Achieve best focus. Decrease exposure time if
needed. A new dark frame must be taken every time you change exposure times.
Repeat until you achieve perfect focus.
Remember, brighness values change a lot with very little movement of the
autoguider especially near perfect focus. You must be able to repeat this
position so use a focus ring or whatever to do this. I spent many hours
getting focus and never would have done it without the help of great
articles by Guido Pasi & Michael Hart located in the mapug archives. Good
luck.
Alan
______________________________________________
FREE Personalized Email at Mail.com
Sign up at http://www.mail.com/?sr=signup
