Re: Alternatives to Drift Alignment?

On Mon, 1 Dec 2003 18:46:21 +0000 (UTC), [EMAIL PROTECTED] (Brian Tung) wrote:

>What do you consider a typical exposure time?  I guess the amount of
>field rotation also depends on how far the target is from the pole.

With CCDs, subexposures of 10 to 30 minutes seem most common when people are in
the field. Of course, film exposures may be much longer.

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Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com