3.9-inch, f/4.5 telescope lens
Date: 1880-1920
Inventory Number: 1998-1-0415b
Classification: Lens
Maker: American
User: Harvard College Observatory (founded 1839)
User: George R. Agassiz Station, Harvard (1951 - 1982)
Cultural Region:
Dimensions:
10 x 10 x 0.9 cm (3 15/16 x 3 15/16 x 3/8 in.)
Material:
Description:
This lens is plano-concave and has a diameter of about 3 15/16 inches. Some blacking is on the ground edge. Part of a paper wrapper is taped to the lens and reads:
[Plan]o-Concav[e] / 3 15/16 x 18" Focus.
[Plan]o-Concav[e] / 3 15/16 x 18" Focus.
Signedunsigned
Historical AttributesUsed by Harvard College Observatory.
ProvenanceHarvard College Observatory, Agassiz Station; transfer to CHSI in 1969.