Double concave lens, by j. Duboscq, c 1870


A double concave (diverging – or negative lens) of j. Duboscq a paris (1817-1886). The lens is situated on the lacquered brass telescope foot. The diameter of the lens is 7.5 cm and the minimum height is 43.5 cm.

SKU: 00 331123 B S Categories: ,

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