Newtonian secondary mirror cover

Cover for the elliptical plane mirror made as a secondary mirror for a Newtonian reflector telescope.

Object Details

ID: AST0823.1
Type: Newtonian secondary mirror cover
Display location: Not on display
Creator: Unknown
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London, Herschel Collection
Measurements: Diameter: 29 mm;Overall: 36 mm
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