Refracting telescope on equatorial mounting, 1790-1810

1790-1810 in London
George Dollond
Peter and John Dollond

Refracting telescope of 2 3/4 inch aperture and 18 inch focal length by Dollond, London, on an adjustable equatorial mount with a fitted mahogany case. Accessories include, 4 eyepieces, a wedge and an ivory annulus that fits to the objective lens for illuminating cross-hairs.

Dated to the early nineteenth century, this brass telescope was made by the London instrument makers, Peter and George Dollond. The instrument has a 2 ¾-inch lens and is carried on an equatorial mount of the type first introduced by the Sissons family of instrument makers. Used in conjunction with a table, the equatorial stand could be made horizontal using the three adjusting screws and the pair of spirit levels. Once adjusted, objects could be located using the circular setting scales. A telescope this quality would have only been affordable to wealthy individual who had an interest in astronomy.


Object Number:
complete, glass, ivory, mahogany and metal
overall (assembled): 630 mm x 500 mm x 400 mm,
telescope - refracting
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Pearson, H.

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