Some further special Derogy lenses.
1. Late pillbox style with a third glass in the rear achromat. Not registered in Pont et Princelle. Serial number 22440.
2. Derogy’s simplified version of the de Pulligny adjustible landscape. Serial no. 32995. The huge example shown in P et P is 60cm. This one has a gun metal finish and just F8 and efl 30cm.
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