Re: pinhole size

Measure the distance from the pinhole to the back. Multiply the distance (in
inches) by 55. The result is the square of the optimal diameter, in
thousandths of an inch. If an altoid can is 3/4 of an inch deep, the optimal
diamter is .0064 inches.
----- Original Message -----
From: "Steve Shapiro" <sgshiya@redshift.com>
To: <pinhole-discussion@pinhole.com>
Sent: Friday, July 19, 2002 4:07 PM
Subject: Re: [pinhole-discussion] pinhole size

> I never got a definitive answer to my questioon about the best advisable
> pinhole size for the sharp image with an Altoid can pinhole camera.
>
> S
> ----- Original Message -----
> From: "William Erickson" <erickson@hickorytech.net>
> To: "ppinhole discussion" <pinhole-discussion@pinhole.com>
> Sent: Friday, July 19, 2002 1:52 PM
> Subject: [pinhole-discussion] pinhole size
>
>
> > I misspoke this morning when i sent a comment about the relationship
> between
> > pinhole size and sharpness. I indicted that exposure doubles with every
> 40%
> > increase in diamter. It should have been the area of the aperture
doubles,
> > and thus time halves.
> >
> >
> >
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>
>
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Received on Fri Jul 19 21:53:46 2002