»Photographe à Verres Combinés« by Charles Chevalier, c. 1840
This brass lens is significantly faster than the early simple lenses by Chevalier. It is the first convertible lens in optic history. Length: 3 ⅛ in., screw-in mount diameter 2 ¼ in.
Estimate: € 2,000/3,500
US$ 2,400/4,200
Reserve: € 1,500/US$ 1,800

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