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[OM] Re: Transit of Venus/Exposure

Subject: [OM] Re: Transit of Venus/Exposure
From: Ralf Loi <ralf_loi@xxxxxxxxxx>
Date: Fri, 14 May 2004 16:41:14 +0200
Charlie,
I have some astropics skill, mainly in night sky, but I also managed to do
in the past some solar photos.
First problem, with a 500 mm telephoto, you probably will see quite
nothing. Diameter on the film will be around 0.14 mm (if the venus diameter
is 60 arcsec as I remember). You have to limit the exposure to very short
time, in order not to blur the image due to air movement.
For the exposure, I would suggest to try in advance. If you have a spot
camera (OM2-sp, OM3, OM4), you can start with the spot metering directly on
the sun.

Ralf Loi



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