I've recently acquired several lenses with faulty shutters of the same size that have me wondering if a DIY casket set could be made from certain cells.
For example, the old convertible Symmars in focal lengths of 150mm/265mm, 180mm/315mm, and 210mm/370mm apparently all fit into a #1 shutter. I have also seen these lenses for sale mounted in Sinar DB mounts or in barrel for considerably less money than those mounted in shutters like Compurs or Copals.
Is there any difference in mounting threads between the above lens cells intended for #1 shutters vs. Sinar DB mounts or standard barrels? Or, if they can be mixed, is there some combo that would produce 240mm or 300mm to round out the standard progression?
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