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Other Dollond Instruments

 

Wooden Library Telescope

Signature Dollond , London

Date circa 1800
Number of Draws 1
Dimensions English Metric
Main Tube Length 28.8in 732mm
Main Tube Diameter 2.6in 66mm
Total Length 40.1in 1018mm
Closed Length 37.9in 962mm
Objective Clear Aperture Diameter 2.2in 55mm

Description

This telescope has a round tapered mahogany barrel, painted reddish-brown.  The objective lens is an achromatic doublet and has a push-on cap.  It has a single brass draw with rack and pinion focusing by a thumbwheel.  There are two separate eyepiece tubes, which screw into the draw:

Terrestrial: It has four lenses, contained in a segmented brass tube, with a flared eyecup

Astronomical: It has a Huygens two-lens eyepiece, contained in a short brass tube.  It produces an inverted image.  This eyepiece also has a screw-on flared lens cup containing a sun filter.

It is signed "Dollond * London" on the brass back plate of the barrel.  The telescope mounts on a folding cabriole tabletop stand.   

 

 


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