[photo-3d] Re: MF stereo

["Rod Sage" <rsage@xxxxxxxxxxxxxxxxxxxx>]

--- In photo-3d@xxxxxxxxxxx, darren5781@xxxx wrote:
> Here's a question. Could you take stereo pairs in a medium format
> camera, cut the negatives apart, mount the negative pairs on a
sheet of
> glass and make contact printed stereocards for a stereoptican that
would
> still be worth viewing?? And if so would anyone have a clue about
image
> spacing and determining the stereo window. (and making a mounting
jig,
> or is this already out there somewhere but I just have never ran
into
> it?)
> 
> Thanks, 
> Darren

Pairs of 6x6 images composing a 6x13 view were very common in Europe 
going back to the early 1900's. Many cameras were designed for this 
format both in B&W glass slides and cards. Early cameras of course 
used sheet film or glass plates. The Rolleidoscop is probably one of 
the first to use roll film. I have a German EHO box camera which came 
with a simple folding viewer for cards. I would probably suggest that 
you mount the views in a 6x13 format and try to locate a viewer or 
construct your own. Very simple as no prisms are needed. The focal 
length should also be about half that of a Holmes viewer which will 
make the image appear larger. I often consider 6x13 the ideal format 
as cameras can be made with no complicated advance sequence, the lens 
spacing is close to eye spacing, film is easily contact printed, 
simple viewers etc.. 

Rod S.