Stereo Window -Window to the World

[P3D Bill C Walton <bill3dbw3d@xxxxxxxx>]

P3D Paul Talbot asked me to explain stereo 
window reversal.  I thought this was self  explanatory, 
but maybe not, so here goes (I am sure I will get some 
CORRECTIONS on this, but so be it:

When the stereo window is correct there is more subject 
matter shown on the inner edge of the right image than 
there is on the outer edge of the left image and there is 
more subject matter shown on the inner edge of the left 
image than there is on the outer edge of the right image.

When the stereo window is reversed there is more subject 
matter shown on the outer edge of the left image than there 
is on the inner edge of the right image and more subject matter 
shown on the outer edge of the right image than there is on the 
inner edge of the left image.

When the window is correct , the edges fuse well, and this makes 
for pleasant viewing.  When the window is reversed there is 
extraneous material on one or both sides of the viewed image and this 
affects  the "apparent reality " of the stereograph and reduces the 
viewing enjoyment.  I am not sure that slide enthusiasts are concerned 
about reversed windows but those of us who do prints sure are.

Paul- I hope this answers your question.  I guess I could draw a diagram
but I am such a computer newbie that I have trouble with Email, much less
something like a window reversal diagram.

P3D Larry Berlin wrote that making smaller masks for slides is the 
same as enlarging a negative for a print.  Maybe, but i don't see it 
that way.  When I make a big enlargement and crop a 2 14/16 inch 
wide and 3 1/8 inch high stereograph out of it, I think I get a different

effect, especially if I crop in one corner.  Again, I don't know a lot 
about slides, but if you put a little mask on a slide  it would appear to
 
me that you may be covering up a part of the stereograph that  would 
enlarge into an acceptable stereo image.  Is this incorrect.?.

Larry also wrote about enlarging, but using a computer first.  Sounds
good 
to me but unfortunately I don't know how to do that  yet.  I just bought 
a scanner (haven't hooked it up yet) so maybe I will get knowledgeable
enough to learn to manipulate photos.  I plan on it anyway and I will
probably come up with some real DUMB questions in the process.

Think NSA Seattle

BILL C WALTON
MUSCOGEE 3D


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