Ernst Abbe invented the orthoscopic eyepiece in 1880, and it has become a favorite of amateur astronomers ever since. Its field lens consists of a cemented triplet matched to a single plano-convex eye lens. Orthos are close to perfect eyepieces that have excellent eye relief, nearly non-existent chromatic or spherical aberration, have a fairly flat, wide field of view (40 to 50 degrees), and have little internal reflection. Ortho eyepieces remain one of the best for nearly all amateur telescopes. (From http://www.astro-tom.com/telescopes/eyepieces.htm)
Categories
Astronomy-> (962) |_ Accessories-> (613) |_ Astigmatic corrector-> (1) |_ Collimator-> (6) |_ Diagonals-> (22) |_ Eyepieces-> (214) |_ Binocular Viewers (5) |_ Eudiascopic Eyepieces (3) |_ Eyepiece Accessories (52) |_ Eyepiece kits (6) |_ Eyepieces for Imaging (2) |_ Guiding and Reticled eyepieces (3) |_ Orthoscopic (7) |_ Other (12) |_ Planetary Eyepieces (11) |_ Plössl (33) |_ Wide Angle (75) |_ Zoom (5) |_ Filters-> (139) |_ Finders-> (23) |_ Focal Length Adapters (Barlows)-> (32) |_ Focusers-> (14) |_ GPS Systems (1) |_ Mounts-> (51) |_ Observatory Domes |_ Other-> (27) |_ T system (65) |_ Telescope Making (ATM)-> (18) |_ Astro photography-> (7) |_ Binoculars-> (23) |_ Books and Software (21) |_ Events-> |_ Imaging-> (61) |_ Observatory Domes (1) |_ Solar-> (169) |_ Spectroscopy-> (5) |_ Telescopes-> (62) Cases-> (13) Gift Certificates (1) Photography-> (64) Terrestrial-> (73) Specials ... New Products ... All Products ... Specials [more] Baader Planetarium Universal Digital Camera Holder R795.00 R675.75 Save: 15.00% off |
Orthoscopic
New Products For April - Astronomy |
BestsellersAds by Goooooogle |
Your IP Address is: 34.239.152.207
Copyright © 2023 Eridanus Optics CC. Powered by Zen Cart
