There's a thread over on APUG about remounting convertible Symmars from Sinar DB mounts into shutters. After reading through it, I posted a question in that thread that I'll repeat here:
When remounting a Plasmat like a Symmar, is the spacing between front and rear groups critical? I imagine there is an optimum spacing, but I also suspect remounting DB lens groups into a modern shutter that has the same threads would give acceptable results. For that matter, if one had a number of convertible Symmar cells of different focal lengths that fit the same shutter, wouldn't a casket set of sorts be possible from the various groups? I think the 150mm,180mm & 210mm all fit a modern #1 shutter, and the 240mm, 300mm & 360mm fit a #3, while the 80mm, 100mm, and 135mm fit a #0.
Anyone mixed and matched them?
I'm curious if it is practical even though perhaps not optimal. For that matter, couldn't later Symmars (Symmar-S series for example) marketed without the "convertible" designation also be used as single groups or mixed focal length groups, maybe even with older element groups?
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