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Reverse Taper Telescope



Date circa 1750
Dimensions English Metric
Main Tube Length 48.5in 1232mm
Main Tube Diameter (objective end) 1.6in 40mm
Main Tube Diameter (eyepiece end) 2.0in 50mm
Total Length 58in 1470mm
Objective Diameter 0.9in 23mm


This telescope has a very long round reverse-tapered wood barrel.  The screw-on brass objective lens cap has a built-in slide cover.  The single objective lens is non-achromatic and it has been replaced.  It has one segmented draw (without retention), a three lens eyepiece, and a bulbous style eyecup with a slide cover.  It is not signed by the maker.


College of Optical Sciences
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