RE: Camera Design Problem

is the film plane curved towards or away from the pinhole?
is the radius on the 4" or 11" side of the paper?
if it's curved away it should be "fairly" easy to construct removable backs
like Max suggested. The only part that may be tricky would be the joint.
You might want to put a stop on the dark slide to prevent it from being
totally removed. The stop might also be useful to help seal up the slide
opening for long exposures. The down side is the dark side flopping around.
andy
-----Original Message-----
From: pinhole-discussion-admin@pinhole.com
[mailto:pinhole-discussion-admin@pinhole.com]On Behalf Of HypoBob
Sent: Wednesday, December 13, 2000 1:45 PM
To: pinhole-discussion@pinhole.com
Subject: [pinhole-discussion] Camera Design Problem

Group,

I have been making pinhole images on 4x11 inch paper negatives mounted on a
film plane with a 5
inch radius of curvature. The results have been very satisfying, but the
aggravation of running
back to the darkroom to unload and reload after each exposure is getting to
me.

I would like to modify the camera so that it holds five or six negatives
that can be moved into
place without having to open the camera under darkroom conditions.

Does anyone have any clever ideas about how to manipulate these largish
negatives onto and off
of a curved film plane? (I would like to do this entirely within the camera
without the use of
changing bags or portable darkrooms.)

I saw one design with flat negatives that were on hinged plates that could
be pulled up into
position with strings that were fed through the camera body. Great idea,
but it does not lend
itself to anamorphic designs with their curved film mounting.

My first design was a complete flop, and I have a couple of other
rudimentary ideas, but before
wasting more and more hours on approaches that may have no hope of success,
I thought I would do
a "literature search" to see if anyone in this group knows of a viable
approach.

Thanks,
Bob

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Received on Wed Dec 13 14:50:24 2000