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Old 17-07-2015, 07:11 PM
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Geoff45 (Geoff)
PI rules

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Join Date: Jul 2006
Location: Sydney
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Quote:
Originally Posted by codemonkey View Post
Thanks everyone!



Eh, he says a number of things, including:

"Focal length (and thus f-ratio) has absolutely no effect on the number of photons collected and delivered."

Either way, I derailed my own thread by mentioning that article. I didn't realise it would be so inflammatory.
Well the statement in quotes is obviously true. There is no way that f ratio can affect the number of photons hitting and hence being transmitted by the objective. What happens after the photons are transmitted by the objective is where the disagreement arises.

Nothing wrong with robust or inflammatory discussion. Just treat it as all good fun!

Last edited by Geoff45; 17-07-2015 at 07:45 PM.
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