Xref: utzoo rec.photo:21771 sci.electronics:20464
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From: ghot@ms.uky.edu (Allan Adler)
Newsgroups: rec.photo,sci.astronomy,sci.electronics
Subject: Power Supplies For Ordinary Cameras in Astronomy
Message-ID: <1991May28.040922.19112@ms.uky.edu>
Date: 28 May 91 04:09:22 GMT
Article-I.D.: ms.1991May28.040922.19112
Sender: ghot@ms.uky.edu (Allan Adler)
Organization: University Of Kentucky, Dept. of Math Sciences
Lines: 19


I have a Minolta XG-1 which I would like to use to take astronomical
photographs. I have friends who have telescopes and adapters. But I
recently became aware of a new difficulty: if a shot is going to 
require a long explosure (e.g. 90 minutes), the battery in the camera
will run out before the exposure is complete. Even with somewhat shorter
exposures, it is desirable to avoid having to buy a battery for every long 
exposure. 

I know there are special cameras one can buy but I think they must be
expensive. On the other hand, maybe it is not difficult to obtain or
build a portable power supply that can replace the battery, maybe from
a VCR portable power supply. I don't want to experiment with this
myself because I am afraid of burning up the camera.

Any ideas ?

Allan Adler
ghot@ms.uky.edu