A while ago I posted about three f.18 Protars, 8.5cm, 14cm and 32cm I had acquired. All have f-stops marked at 18, 25, 36 and 50 although they stop down slightly beyond 50 in every case. The 8.5cm has a Roman numeral I on the barrel; the 14cm a Roman II; and the 32cm has Roman IV, subscript 2. Members of this forum provided some very useful information at that time. They are unmarked and crystal clear and I would now like to try them out.
A further I question I have is, does anyone know details of the thread diameter and pitch of these lenses and how best I should go about mounting them, either on an MPP field or Sinar monorail camera. Is it possible to get them fitted to a shutter of any kind or should I just accept that I'll be using lens-cap exposures?
Any information, advice or suggestions welcome.
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