4.5-inch telescope objective
Date: circa 1900
Inventory Number: 1996-1-0481o
Classification: Telescope Objective
Maker: Bausch & Lomb Optical Company (1853-present)
Maker: Harvard College Observatory (founded 1839)
Cultural Region:
City of Use:
Dimensions:
cell: 15.2 × 15.2 × 3 cm (6 × 6 × 1 3/16 in.)
Material:
Description:
1996-1-0481o is a telescope objective in a cell. The objective appears to be a doublet with a clear aperture of 4 1/2 inches. The cell is made of brass with a darkened front bevel and knurled rim. This is threaded into a sleeve of aluminum. The inside back edge of the cell is lined with cork.
The focal length is
The focal length is
Signedon cell: BAUSCH & LOMB OPTICAL CO.
Historical AttributesThis optical element was used by Harvard College Observatory and came from Agassiz Station.
ProvenanceHarvard College Observatory, Agassiz Station; transfer to CHSI in 1969.