Re: question on making pictures of pebbles...

Hi John,

Welcome to the group! Your idea is a good one. The best thing to do
is try it and see. My guess is that you'll definitely get the pebbles
close up, but because of the greater distance between the aperture and
the edge of the film plane, there will be a lot of light loss at the
far edges. This could well enhance the image. Another possibility is
to move the paper closer to the pinhole and make the exposure with the
camera on its side. I've done this with mixed results, mostly bad. I
like the idea of moving the pinhole closer to the bottom of the can.

Tom

----- Original Message -----
From: "John Ptak" <jfjptak@yahoo.com>
To: <pinhole-discussion@pinhole.com>
Sent: Monday, March 26, 2001 11:54 PM
Subject: [pinhole-discussion] question on making pictures of
pebbles...

> Hello group.
> I'm new here and to pinhole as a process as well. (I
> have just completed an 8-part course at the
> Smithsonian given by the excellent Ed Kirkpatrick).
> I've made 3 cameras of metal containers of various
> sizes with good results. Presently I do have a
> question which I hope the members of this group will
> be able to address. Say I'm exposing a 7x10" paper
> negative in a round can (150mm diameter, 170mm tall,
> f=256 or so) with an aperture on the center of the
> wall of the can. What happens if I were to make a new
> aperture closer to the bottom of the can, for example
> at about 20mm from bottom? The effect I'm trying to
> gain is imaging small objects close-up at ground
> level, and I'm thinking that one way of doing this is
> with this low-level aperture with the camera on the
> ground. Is this the case?
> Many thanks for your help.
> Best regards,
> John Ptak, Washington DC
>
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Received on Tue Mar 27 08:05:37 2001