No. 1 Semi-Achromatic Doublet, 9-inch f/4 lens

No. 1 Semi-Achromatic Doublet, 9-inch f/4 lens

Lens

Pinkham & Smith

Maker
American

No. 1 Semi-Achromatic Doublet, 9-inch f/4 lens

Bequest of Alvin Langdon Coburn

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