f-number

From: Renovica <reno_at_domain.name.suppressed>
Date: Tue 13 Mar 2001 - 14:38:51 PST

I made a pinhole with a pinhole diameter of 0.1mm. What formula do I use to calculate the f-number? How do I determine the exposure time.
Please reply to this email address. Many thanks.
Gorana Renovica
Received on Tue Mar 13 17:35:33 2001

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