Folding opera glass in leather case

Made:: 1786 in London

Combined pocket folding opera glass and magnifying glass with fob ring in red leather case, unsigned, London, England, hallmarked 1786. Consists of a double objective lens that hinges independently, together they act as an achromatic lens while the front biconvex lens can be used as a hand magnifier.

Details

Category:: Optics

Object Number:: 1943-191

type:: telescope - galilean, telescope - terrestrial, telescope - refracting and instrument case

credit:: Stevenson, A.

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Folding combined opera glass and magnifier

Combined pocket folding opera glass and magnifying glass with fob ring, unsigned, London, England, hallmarked 1786. Consists of a double objective lens that hinges independently, together they act as an achromatic lens while the front biconvex lens can be used as a hand magnifier.