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Description: | Dollond / London
The wooden barrel of this Galilean telescope is covered in dyed rayskin (shagreen), while the single draw tube is made of brass. A thumbwheel on the eyepiece allows the viewer to select one of four lenses of different magnifying powers. The lenses are numbered from 1 to 4 and there are numbered stop lines on the draw tube, indicating the optimum length corresponding to each of these lenses. The screw-on cap for the objective lens is missing.
The maker's name appears on the draw tube as 'Dollond / London'. This was the firm established by Peter Dollond (1731?1820).
Focal Length: 4.5"-6.3".O.G.diameter: 2.3".
caption: Spyglass telescope | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Rayskin (shagreen) Vellum Achromatic lens achromatic telescopes Dollond & Aitchison Galilean telescope | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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