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College of Optical Sciences

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Three-Draw Telescope

Signature Cox, London

Date circa 1800
Dimensions English Metric
Main Tube Length 8.8in 223mm
Main Tube Diameter 1.8in 45mm
Total Length 28.2in 717mm
Closed Length 9.4in 238mm
Objective Clear Aperture Diameter 1.4in 36mm

Description

This telescope has a round parallel wood barrel. The push-on cap for the objective lens is missing.  The objective is an achromatic doublet.  It has three brass draws, a four lens eyepiece, and a flared eyecup with a sliding cover. It is signed "Cox   London" on the eyepiece tube, with the eyecup to the left.

 


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