Talbot's Stereo Photograph this week

[Roger Eichhorn <eichhorn@xxxxxx>]

I'm not qualified to comment critically on this week's exhibits, 
however I copied Bog Talbot's stereo images into Photoshop Elements, 
moved the two images together and printed them out in a size 
appropriate for my late 19th century stereopticon viewer (I can't see 
the 3D effect without help.).  The result was a great 3D image with 
few obtrusive artifacts (The printing on the right hand bottle is 
fuzzy, but I printed a low resolution image). Congratulations!

Now for my question.  I know how to find the nodal point for my Nikon 
4500, the required separations between images, and I can take two 
images as Bob Talbot has done.  But, many 3D photos are done with 
red/green, red/blue or vertical/horizontal polarizations superimposed 
on the same image.  How do I accomplish that?  Do I need to use 
filters when taking the images, or can I do it in Photoshop 
afterwards?  Given enough time, I suppose I can figure it out, but 
perhaps someone on  the list can help me save some of that time.


Roger
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