|
|
|
|
|
|
|
|
Collection Home > Telescopes > Multiple Draw > Four-Draw Telescope
Four-Draw Telescope
| Signature | Dolland, London |
 |
||||
| Date | Circa 1800 | |||||
| Dimensions | English | Metric | ||||
| Main Tube Length | 10.7in | 271mm | ||||
| Main Tube Diameter | 2.2in | 56mm | ||||
| Total Length | 42.4in | 1077mm | ||||
| Closed Length | 11.4in | 290mm | ||||
| Objective Clear Aperture Diameter | 1.14in | 50mm | ||||
|
Description |
This telescope has a round parallel mahogany barrel with a push-on cap. The objective lens is an achromatic doublet. It has four brass draws, a four lens eyepiece, and a flared eyecup with a sliding cover. It is signed "DOLLAND, LONDON" on the eyepiece tube, with the eyecup to the left. |
|||||
|
|
|||||
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.
