Re: Pinhole Focus

----- Original Message -----
From: "Ian McKee" <photoian@earthlink.net>

> I made two assertions; 1) that at a given extension you will get the same
> image regardless of pinhole size and 2) that the sharpness was the same
for
> each image.
> I will stuck to the first and admit I'm on shakier ground on the second.

You are absolutely right on the first assertion, for a given extension, no
matter the size of the aperture the resulting perspective is the same. The
same happens when mounting an SLR with a non-zoom lens on a tripod and
taking several exposures each one with a different aperture without moving
the camera or tripod, all images will be the same, all images will have the
same perspective.

> Regardless of the results, doing it is fun and enlightening!

That's the most important thing, good for you!

Next time you do the test, I suggest your subject is closer to the camera,
or maybe even have a near object and a far one and a subject in between.
You can go as close as 10 or 15 times the focal length distance if you
wanted, for the near object. Let us know the results.

Merry Xmas to all.

Guillermo
Received on Wed Dec 18 10:53:14 2002