Date: Mon, 12 Nov 2001 11:18:30 +0000
From: Roger Wesson <ucaprwe@xxxxxxxxx>
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Subject: Re: [OM] Leonids (But what lens & film)
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Meteors are still point sources - moving ones, that's all. I've read
somewhere (can't remember where so this claim is uns*ubstantiated) that
the best compromise between aide aperture and decent sky coverage is a
fast 50mm lens. My strategy will be to take my two camera bodies with
me to Oz (I'll be in or around Canberra) and have one with a 28/2.8
doing trails on 100 speed film, the other with a 50/1.8 doing lots and
lots and lots of 20s shots on 1600 film. Might slip on my fisheye
adaptor for a while as well - I think that could result in a fine, fine
shot.
Barn door mount is a good idea. I built one some years ago, and I found
it adequate for 10 minute exposures, which would get you a hell of a lot
of meteors if the storm happens according to predictions.
Roger
"W.Xato" wrote:
I am going to try to build a barndoor star tracker
that is large enough to hold 3 OM bodies. I guess I'll
use my 2 OM-1s and an OM-3.
I got sidetracked in the star trails discussions where
they say that the f number isn't important but that
the physical aperture of the lens is due to the stars
being a point source of light. But a meteor is just a
regular object and not a point source so both maximum
aperture of the lens and film type are important.
I have several lens I can use, from 16/3.5, 24/2,
28/2, 50/1.4, 80/2, 100/2, Vivitar 135/2.3 and I
haven't bought film yet. What would the group
recommend? If I could get 20 to 30 visible meteors on
a fisheye shot, I would be quite happy.
I was thinking ISO 400 or 800 negative film might be
the best film to use. Again, what would the group
recommend.
Thanks in advance.
=====
Warren Xato
For where to go when you know when
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