RE: [APML] My longest shot

[Éder Iván <eder@prof.hu>]

Wade,

Yes, you must have a really dark site.
When I will have some exceptionally clear night, I will try to shoot 3 
hours for the same objects, (if I can solve my autoguiding problem...). 3 
hours at f/6 is almost the same like 90 min at f/4, right? (ok, a little 
less...)

Ivan

At 16:30 2005. 09. 19.t Conve, you wrote:
>Ivan,
>
>I have a really dark site and this is the approximate time needed to reach 21
>magnitude/arc second at F/5.0.  I'm not quite sure if there are any 
>fainter nebula
>to "discover"; however, it should make those already faint nebulas stand 
>our more
>clearly.  If it's really cold, I'll probably decrease the exposure to just 3
>hours.  As an aside, I can easily go 90 minutes at F/4.0 with E200 developed
>normally.
>
>Wade
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