Parks Optical's Astrolight AZ6 and AZ8 Newtonian reflector telescopes utilize a 6-inch f/6 and 8-inch f/6 optical design, respectively, featuring American-made Pyrex mirrors. Both models are mounted ...
The Celestron NexStar Evolution 8 telescope, a Schmidt-Cassegrain design, was reviewed, encompassing its assembly and functionality. The telescope's components included an 8-inch OTA, alt-azimuth ...
At head of title: Department of Commerce. U.S. Coast and Geodetic Survey. O. H. Tittmann, superintendent. Most of the plates are printed on both sides.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback