The University of Arizona
College of Optical Sciences

Collection Home > Telescopes > Multiple Draw > Three-Draw Telescope

Other Instruments by Dolland

 

Three-Draw Telescope

Signature Dolland, London

Date Circa 1800
Dimensions English Metric
Main Tube Length 10.0in 254mm
Main Tube Diameter 2.4in 61mm
Total Length 30.2in 767mm
Closed Length 11.0in 279mm
Objective Clear Aperture Diameter 1.1in 29mm

Description

This telescope has a round parallel brass and mahogany barrel. The objective lens cell is attached to a screw-on lens cover with a built-in slide. The objective is an achromatic doublet. It has three brass draws, a four lens eyepiece, and a tapered eyecup with a sliding cover. It is signed "Dolland London" on the smallest draw, with the eyecup to the right.

 


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.