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P3D Stitz/Miida Beamsplitter

Mark Sheilds asks 
Have any of you had experience using the Stitz or Miida
beamsplitters? I'm particularly interested in the possibility
of using one with an 85mm lens--something like this is supposed
to be possible because the mirrors in these splitters are
adjustable. I'm also investigating the possibilities of going
the other direction and adjusting the mirrors for closeups
with a 50mm or possibly a 40mm lens.

I've done a lot of shots with my Pentax and Stereotach splitters,
but neither of these is adjustable.

I'm also considering getting a Porter or Franka splitter and
replacing the second-surface mirrors with front-surface.
These are supposed to adjust for closeups but I don't think
they'll do telephoto.
I believe the Stitz/Miida is the most advanced of the beamsplitters. Not only is the toe-in adjustable for 50-300mm lens, there is also an adjustable curtain to give a sharp center line. I'm not sure how close you would want to go at 40-50mm since the interocular remains at about 70mm  and the toe-in will throw the background out of whack. It would be better to use it with a telephoto lens.RDS