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[AZ-Observing] Re: Photo from last week's Vekol Star Party
- From: Brian Skiff <Brian.Skiff@xxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Sat, 11 Jun 2005 15:23:46 -0700 (MST)
>> There was also a significant difference in the star sizes between
>> F2.8 and F5.6. ( I guess the short answer to your question would be yes,
>> all of the above!)
I would certainly think f/2.8 would be no good, but was thinking
that mainly you could halve your exposures at f/4 or go somewhat shorter
at the half-stop in-between there and f/5.6 (i.e. f/4.7). But it is not
surprising that having to deal with separate blue, red, and unfiltered
"luminiance" images makes tougher demands on refractive optics.
\Brian
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