The University of Arizona
College of Optical Sciences

Collection Home > Telescopes >Monocular Single-Draw > Ramsden Shagreen Opera Glass

Other Ramsden Telescopes


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


Red Leather Case


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


College of Optical Sciences
The University of Arizona, 1630 East University Boulevard, Tucson, Arizona U.S.A. 85721-0094

All contents copyright 2008  Arizona Board of Regents.