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(meteorobs) Re: photos of perseids
20 second or even one minute exposures are a waste of film. The odds of
capturing a meteor on such a short exposure, even during the Perseid
maximum, is remote. I would suggest at least 5 minute exposures making
sure the camera is aimed well away from the moon. A good region of the
sky would be due north toward the north celestial pole (Polaris). Star
trailing is minimal in this region. If you have the capability of a
driven equatorial mount this by all means use it as the results will be
more pleasing.
Clear Skies!
Robert Lunsford
> Tom Fleming wrote:
>
> Ulrich,
>
> The Moon will be at last quarter phase. Shooting at ASA 3200 @ f/1.7
> - - you should experience sky fog on relatively short exposures. Just
> at a guess, I am thinking about a 1 minute exposure. Star trails
> become evident on film at around a 20 second exposure with a camera of
> 50mm focal length mounted on a tripod. If your system is automated
> you might consider 20 second exposures. You should grab star images of
> 6th magnitude in that time if they dont wash out due to the moonlight.
>
> Tom
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