Astrolabe
Measure the inclination from celestial objects or the Sun.
Optics Museum, College of Optical Sciences
The University of Arizona
Tucson, AZ, USA
2018-02-20 10:04:31 AM
Canon EOS 6D, f/4 @ 50 mm, 1/40, ISO 1600, No Flash
Joseph A. Carr www.JoeCarr.ca
