Gregorian reflecting telescope of 2 1/2 inch aperture and 8 inch focal length by Robert Brettell, 19th century.

 
Gregorian reflecting telescope of 2 1/2 inch aperture and 8 inch focal length by Robert Brettell, 19th century.
4 0 c m
 
32cm
actual image size: 24cm x 32cm

Description

Gregorian reflecting telescope of 2 1/2 inch aperture and 8 inch focal length by Robert Brettell. On an altazimuth stand with a folding claw foot tripod and a fitted mahogany case. Iron, glass and wood. London, England, 1808-50.

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