On Mon, 27 Sep 1999 WKato@xxxxxxx wrote:
:In a message dated 99-09-27 03:44:10 EDT, you write:
:
:> OK, I get it that stars are a point source; no focal length will render
:> them anything other than points. But how dow focal length affect how fast
:> the trails form? How is the motion magnified when the point isn't? I've
:> been racking my brains over this one to no avail.
:
:Each lens takes in a different angle of view. An apparent small movement on a
:wide angle will become an apparently longer movement with a telephoto. Or in
:the alternative it, the telephoto, will form a star trail faster. It has
:nothing to do with the point source image. Did I understand your question
:correctly?
Yes, that was my question...although I still don't get it.
/Acer "steppenwolf" Victoria
--
video meliora proboque, deteriora sequor--Ovid
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