RE: [APML] Newbie question

["Gene Horr" <genehorr@houston.rr.com>]

Without seeing the pictures I am taking a bit of a stab in the dark (or
would that be a stab in the fog....).  You didn't say at what f/ratio
but at a slow f/ratio you might not have exposed long enough
to gather enough information on the film.  So the light recorded
for the stars are just above the background noise inherent in
the film.  Therefore when you did your print you were basically
just printing film grain.

A quick check would be to compare the 10 minute exposure to
the 5 second.  If the 10 minute was less foggy appearing then
you just need to exposure longer.

If both are equally foggy then you may be in too light polluted
an area and even with a clear night the light pollution is most
of what you are recording.

Gene Horr

-----Original Message-----
From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org]On
Behalf Of G7TZZ@aol.com
Sent: Friday, November 05, 2004 3:33 PM
To: astro-photo@seds.org
Subject: Re: [APML] Newbie question


Hello all, me and my son are new to the group, and having a few problems,
could anyone point me in the direction of a good website for the beginner to
astrophotography.
I have an old Zenit camera piggybacked on a Tal-2. I took some pictures of
the moon which are OK ish, but the ones of constellations appear to be very
foggy.
The sky was very clear for the UK
The film was an ISO 400, exposure times from 5 seconds to 10 minutes.
Any help would be much appreciated.
Thanks Jon and Sam.

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