If the "focal distance" is 1/3 inch, you could expect a visible image cone
of about 1 inch. The rule of thumb is one and a half focal lengths either
side of the axis.
----- Original Message -----
From: "J.E. Patterson" <pinhole@lightjunkie.org>
To: <pinhole-discussion@pinhole.com>
Sent: Saturday, February 16, 2002 8:41 PM
Subject: [pinhole-discussion] new AOL tins; limits on wide-angle pinhole?
>
> The ubiquitous AOL trial CDs have begun appearing in a different
> packaging in our neighborhood; a metal tin slightly larger than a CD
> and about 1/3 inch in height. From this sprang several questions: if
> this was made into a pinhole, how "wide angle" of a pinhole would
> it be (I can do the calculation if given the formula, I think) and is it
> going to cover the whole area of the back? I guess what I mean to
> ask is what are the limits of the "image cone"?
>
> Cheers,
> Jane
> --
> J.E. Patterson
> www.lightjunkie.org | www.luxumbradei.com
>
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Received on Sun Feb 17 06:23:31 2002
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