Comprendre-les-grandes-familles-d-objectifs

A chart titled “9 Optical Formulae” showing cross-section diagrams of nine historical lens designs, including Petzval, Dagor, Cooke Triplet, Planar, Tessar, Plasmat, Biogon, Distagon, and Otus, with light rays passing through to an image plane.

A chart titled “9 Optical Formulae” showing cross-section diagrams of nine historical lens designs, including Petzval, Dagor, Cooke Triplet, Planar, Tessar, Plasmat, Biogon, Distagon, and Otus, with light rays passing through to an image plane.

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