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Thanks to Joe Cali, Gary Becker, and Veikko Makela for their kind
responses. I
will forward a paraphrase of these answers to the original requester. I
did
have one question, however: both Joe and Gary seemed to agree that
increasing
the magnification (e.g., from unity to 7x) on an extended source like a
lunar
halo should decrease its contrast. However, my experience in observing
faint,
extended deep-sky objects is that increasing magnification (up to a
certain
point) will generally actually INCREASE the contrast of the faint source
against the dark-sky background. Do observers of bright light phenomena
(such
as lunar halos and sundogs) generally find that this conventional
"deep-sky
wisdom" is actually reversed?? Again, thanks for forwarding any comments
to me
directly, as well as to the 'meteoptic' list!
Clear skies (or hazy as you prefer... ;>),
Lew Gramer
owner-meteorobs_at_latrade.com
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