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Link to original content: http://fp.optics.arizona.edu/antiques/Telescope/Catalogue/B14/B14.htm
Ramsden Shagreen Opera Glass
The University of Arizona
College of Optical Sciences

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Ramsden Shagreen Monocular

Signature Ramsden, London

Date Circa 1770
Number of Draws 1
Dimensions English Metric
Main Tube Length 2.2in 55mm
Main Tube Diameter 1.8in 45mm
Total Length 4.1in 105mm
Closed Length 2.9in 73mm
Objective Clear Aperture Diameter 1.6in 40mm

Accessories

Red Leather Case

Description

This monocular has a short round parallel cardboard barrel, covered with shagreen.  The objective is contained in a brass cell and is a single non-achromatic lens (possibly a replacement).  It has one cardboard draw, covered in red leather with tooled on silver-colored floral designs.  The single eye lens, which is cracked, is mounted in a flared eyecup made of a material which could be ivory painted or colored black.  The two black rings at either end of the barrel are made of this same material.  It is signed "RAMSDEN   LONDON" on the draw, with the eyecup to the right.  It comes with a red leather-covered cardboard or wood case.

Download Shagreen Texture

 


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