Variable power telescope
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Science Museum Group
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Variable power telescope, No.1, Mk 1, serial no.257, by Sir Howard Grubb & Sons Ltd., Dublin, 1919. signed 'Grubb, Dublin, 1919', diameter of tube 2 3/8 inches, objective 25 mm diameter, diaphragm cap at eyepiece end [telescope sectioned in 1958], lacks cap at object lens end.
Details
- Category:
- Optics
- Object Number:
- 1922-38
- Materials:
- metal, brass (copper, zinc alloy), solder and glass
- Measurements:
-
overall: x 777 mm x , 60 mm, 3.355kg
- type:
- telescope - refracting
- credit:
- Miscellaneous Disposals Syndicate
