beamsplitter mirrors

[P3D Mark J. Shields <northws1@xxxxxxxxxxxxx>]

Hi!

Thanks to the help of list members, I'm enjoying stereo
photography very much!

I have two beamsplitters. The Stereo-tach has rear mirrors
that are thinner and/or beveled better so there is a very narrow
"seam" where they meet in the center. But the outer mirrors are
not big enough, so my slides have dark edges. The Pentax has
rear mirrors that are thicker and/or not beveled so much, so it
makes a dark band in the center (which still shows up on one edge
of each image). Since the Pentax has bigger front mirrors, it does
not have the edge darkness problem that the Stereo-tach does, but
it does have the problem in the center. So whichever one I use,
I do not have a clear image all the way across. This is with a
50mm f/1.8 Olympus lens on an OM-10. The 40mm f/2 does not work
well with either beamsplitter--there are strange image bands along
both edges of the slide.

How is the Miida beamsplitter in this regard? Or is there another
beamsplitter that (1) has large enough front mirrors and (2) a thin,
well-beveled joining of the inner mirrors, so as to avoid the
problem of darkening at _both_ edges of each stereo image?

My apologies for an earlier message with a wrong subject line--I
was rambling! (It may not have even made it--I did not get my own CC!)

Mark Shields

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