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Old 07-11-2012, 06:16 PM
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Tandum (Robin)
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Join Date: Apr 2008
Location: Carindale, Brisbane.
Posts: 4,113
Originally Posted by Peter Ward View Post
That said, for anyone who have not used ultra-narrow band filters, there is a a chalk and cheeze difference between 3nm and 10nm filters, regardless of f-ratio. (AstroDon's web site has some nice examples)
I think Ken Crawford did this one which is a bit of an eye opener.

Out of my price range, we only got $28 instead of 28million out of lotto last night
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