The University of Arizona
College of Optical Sciences

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Single-Draw Telescope


Date Late 1800s
Dimensions English Metric
Main Tube Length 28.0in 711mm
Main Tube Diameter 3.0in 75mm
Total Length 34.3in 871mm
Closed Length 28.7in 729mm
Objective Clear Aperture Diameter 2.3in 58mm


This telescope has a round tapered wood barrel that is covered with an unknown material and painted white. The objective lens is an achromatic doublet. The short brass shade is not moveable and may have had a lens cap. It has a single brass draw tube, a four lens eyepiece, and a flared eyecup with a swivel cover. The brass parts were originally plated with a silver-colored metal, possibly nickel. It is signed on the draw, with the eyepiece to the right, but wear to the brass has made the writing unreadable.


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