Archived posting to the Leica Users Group, 1997/03/14

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Subject: RE: Astrophotography
From: Michael Chan <michaelc@vertex-networks.com>
Date: Fri, 14 Mar 1997 17:49:32 -0800

Greetings,

I took some pictures of the comet a few days ago with my M6 and 90/2.8
mounted on a stationary tripod. The comet fills the 90mm frame quite
nicely and I took a roll of Fuji Super G 800 with exposures from 10
seconds to 1 minute, all wide open at f2.8. I just got my negatives back
and the results are rather disappointing. Stars start to trail for all
exposures longer than 15 seconds and the negative is too thin for the
exposures below 15 seconds. The proper exposure is in the neighborhood
of 40 - 60 seconds.

I am thinking about building a simple device to track the apparent
motion of the sky during the long exposure. I found the device described
in some Astronomy book. Stay tuned for results.

>Michael