Title

Observers using a refracting telescope

Caption

Observers using a refracting telescope of long focal length mounted on a tripod, and fitted with a simple plumb line and scale for measuring the altitude of the object being observed. Engraving from "Oculus artificialis teledioptricus sive Telescopium" by Johann Zahn (Nuremberg, 1702).

Info+

Photos12.com - Ann Ronan Picture Library

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP07113_010554P

License type

Rights managed

Available size

27.4Mb (2.3Mb) / 11.8in x 9.0in / 3543 x 2708 (300dpi)