Re: Building a Stereo Pinhole Camera

[P3D Brian Reynolds <reynolds@xxxxxxxxx>]

John Ohrt wrote:
> 
> P3D Brian Reynolds wrote:
> 
> > My plan is to build a wooden box camera with a pair of pinholes and a
> > divider separating the two halves of the camera.  The images would be
> > on a single sheet of regular or Polaroid film, and I would view either
> > the Polaroids, or a contact print from a 4x5 negative.
> 
> In case you didn't know, there are 4x10 backs and holders available "off
> the shelf".  They are no where near as common as 4x5.  Try asking in
> rec.photo.large.format
> 

I'm a regular lurker (and occasional poster) in
rec.photo.equipment.large-format.

There are two problems with 4x10.  The film holders are not
standardized.  Ron Wisner and KB Canham make two different 4x10 film
holders (and cameras to go with them).  Given that he is using
standardized parts (and has the original factory's blessing) I'd
probably go with Canham's holders if I ever do a 4x10 camera.  The
other (much bigger) problem is that there is no 4x10 film available.
You have to cut down 8x10 film, which is a PITA normally and just
about impossible if you don't have a darkroom.

My current plans are that the single holder camera will be landscape
(the film holder will be oriented horizontally), and the two holder
camera will be portrait (the holders will be vertical).  In both cases
the images produced will be portrait (taller than they are wide).  I
think that using two film holders in a landscape orientation, or one
4x10 holder, would place the outer edges of the film too far from the
lenses/pinholes (assuming a 2.5 inch separation).  I've looked at
camwin.gif from the ftp site and I have to figure out exactlly what it
is trying to say before I can figure out if I'm thinking about this
the right way.

-- 
Brian Reynolds                  | "Humans explore the Universe with five
reynolds@xxxxxxxxx              |   senses and call the adventure science."
http://www.panix.com/~reynolds/ | - Edwin P. Hubble


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