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College of Optical Sciences

OSC Gallery > Telescopes > Multiple Draw > Three-Draw Telescope

Other Gilbert Telescopes

 

Three-Draw Telescope

Signature Gilbert & Wright, London

Date circa 1800
Dimensions English Metric
Main Tube Length 87.3in 185mm
Main Tube Diameter 1.6in 40mm
Total Length 23.2in 590mm
Closed Length 24.0in 610mm
Objective Clear Aperture Diameter 1.3in 35mm

Description

This telescope has a round parallel wood barrel.  The push-on cap for the objective is missing.  The objective is an achromatic doublet.  It has three draws, a four lens eyepiece, and a flared eyecup with a swivel cover.  It is signed "Gilbert & Wright   London" on the eyepiece tube with the eyecup below, which is an unusual configuration.  A sharkskin case is included. 

 


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