Re: f-number

--- Renovica <reno@mbox.vol.cz> wrote:
> 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
>

If you go to
http://members.home.net/hmpi/Pinhole/Articles/Aperture/pin_aper.htm you will
see that your focal length will be in the 8-9mm range and your f stop somewhere
around 75.

Cheers -

george

=====
Handmade Photographic Images
http://members.home.net/hmpi/

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Received on Tue Mar 13 18:27:13 2001