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License'day and night' refracting telescope
Science Museum Group
© The Board of Trustees of the Science Museum
'day and night' refracting telescope, micrometer adapted for use with Rand's micrometer, by Jesse Ramsden, London, England, c. 1800. Brass tube and table tripod, 1 3/4-inch object glass, one eyepiece with sun filter and micrometer eyepiece, fitted in mahogany box, with key, diameter for main tube 1 7/8-inch length 1-foot 5-inch, screw adjustable for altitude of focussing. No lens cap
Details
- Category:
- Optics
- Object Number:
- 1911-252
- Materials:
- copper (alloy), ivory, glass, mahogany (wood) and textile
- Measurements:
-
telescope and eyepiece: 510 mm x 530 mm x 260 mm, , 2.41kg
box: 90 mm x 500 mm x 135 mm, , 1.195kg
- type:
- telescope - nautical and telescope - refracting
- credit:
- J.C. Stevens (Auction Sales)
