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Re: (meteorobs) Question - Photographed Meteors
I would appreciate any info on the "battery powered gizmo". It sounds
like what I have been looking for.
GeoZay@aol.com wrote:
> In a message dated 97-08-05 14:51:16 EDT, you write:
>
> <<
> > From: GeoZay@aol.com
> > Well...I just developed my first roll of film that covered 4 nights
> of
> > observing meteors this past week. I used a 28mm lens at f/2.8, a
> rotating
> > shutter and guided.
>
> Gregg>>George, what ASA (ISO) was the film, and what was your
> exposure
> length? I'm planning on taking guided pictures for the first time
> for this year's Perseids, if I can get the machining finished for my
> barn-door drive. In the past I've taken unguided pictures with ASA
> 1600 film at an exposure length of 5-10 minutes. I seem to average
> 2-3 meteors per 36 exposures.<<
>
> Gregg...I use black and white film HP-5 and develop it for ASA 3200.
> My
> exposure times is approximately near 30 minutes per frame...unless I
> get an
> apparent bright meteor within my camera's field of view....that is a
> -1 or
> brighter....then I try to stop it with an exposure of about 15 or 20
> minutes...this usually gives me very good pinpoint star images. If a
> bright
> meteor appears between the 15 and 30 minute period of the
> exposure....I try
> to stop it as soon as I can.
>
> I don't use a barn door drive...I have a battery powered gizmo that
> tracks
> quite nicely without much attention...except for quick polar alignment
> after
> each exposure...which is simple to do.
> George
>
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