D.R.P.a means "German Federation Patent pending" ... you can see it often on lenses and cameras from that time...
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D.R.P.a means "German Federation Patent pending" ... you can see it often on lenses and cameras from that time...
is their something about the lens design in that kalalog?
I called the history department of Schneider-Kreuznach !!! the "Type D" did not mean "documentation" it means the diameter of the lens at that time... itīs the same like the today "copal 3"...