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Old 12-12-2024, 01:13 PM
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peeb61 (Paul)
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Join Date: Jan 2007
Location: Wollongong
Posts: 730
Hi Ronson,

Many thanks for your reply and for the link....

So if the f ratio is 5.6 and f/l is 80mm, this works out to be 14.286 diameter?

As in the attached?

Paul
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