First LF lens

Neil Poulsen said:

Schneider's image circle spec is at f16, which would increase at f22. In a conversation that I had with Kerry Thalman, the convertible Symmars can be more effectively stopped down for greater coverage, versus Schneider plasmat designs that followed.

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The convertible Symmars were plasmats not so different to the later Symmar S lenses. In fact Schneider offered a convertibel Symmar set for a very short time in the late 1950;s.

Schneider's image circle was given for f16 for lenses primarily designed for 6x9, and f22 for 9x12/5x4 and larger.

Ian