For what it's worth, the optimal size pinhole for a 20 foot tube would be
0.114 inches, or an eighth of an inch.
----- Original Message -----
From: "chad white" <chadwh...@mac.com>
To: <pinhole-discussion@p at ???????>
Sent: Sunday, July 28, 2002 1:06 AM
Subject: [pinhole-discussion] nail hole camera


>
> do i have to paint the inside of the pinhole camera black? i am going to
> use a 20 foot tube and i dont know if i can get to all of it inside.  i
> bet i lose image if i dont. maybe i should be writing to nailhole
> discussion...  the f stop is going to be insane.
>
> thanks for any help offered.
>
>
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