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Other Ross Instruments

 

Single-Draw Telescope

Signature Ross, London

Date Late-1800s
Dimensions English Metric
Main Tube Length 16.8in 425mm
Main Tube Diameter 1.5in 37mm
Total Length 23.3in 591mm
Closed Length 17.5in 445mm
Objective Clear Aperture Diameter 1.2in 30mm

Description

This telescope has a round parallel nickel silver (copper, nickel, and zinc alloy) barrel, wrapped with line and tape, painted black.  This covering appears to be a replacement.  It has an extendable shade, made to take a push-on lens cap, which is missing.  A rope "Turk's Head" knot has been added to the shade.  The objective lens is an achromatic doublet. It has one draw, a four lens eyepiece, and a flared eyecup with a sliding cover, missing its small pin.  It is signed "Ross   London" on the draw, with the eyecup to the right.   

 


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