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From: space@ucbvax.berkeley.edu.UUCP
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Subject: Re: Photographing Halley's
Message-ID: <8601241557.AA14219@ngp.UTEXAS.EDU>
Date: Fri, 24-Jan-86 10:57:56 EST
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Posted: Fri Jan 24 10:57:56 1986
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There is an article in the January issue of Sky and Telescope
on photographing Halley's.  It recommends trying exposure
times of from 10 sec to 30 sec at widest aperture, with fast 
film (ISO 800 to 1600).  These short exposure times will not show 
star trails.  The article suggested trying longer exposure times
of up to 2 min. just for the heck of it.

Steve Poole