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Re: [APML] First halfway decent cassigrain image
--- Bradley <bhope@thorngarden.net> wrote:
> I based the starting exposure on Covington's AstroCalc giving me
> 12min to
> sky fog..and estimating based on my old piggyback work.
I've exposed up to 5 1/2 hours at f/10. Over 3 hours at f/8. Don't be
afraid to break the rules. That's why they were made in the first
place. 8-)
Keep shooting and keep careful records to compare your results with.
Alan
=====
SCT Astrophotography: http://www.pbase.com/avoetsch/astrophotography
FS-102 G-11/Gemini: http://www.pbase.com/avoetsch12952/tak_fs102
& http://www.pbase.com/avoetsch12952/fs102
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