TeleVue Nagler Telescope Eyepieces - TVU034-5 Reviews
Take a "spacewalk" across the widest sharpest apparent field...Concept: You may know there's a long history of naming eyepieces after their designers: Kellner Erfle and Plossl to name a few. In the late 70's I designed an eyepiece sufficiently radical that I dared attach my name to it. Even today I must admit a little discomfort when talking about "Nagler" eyepieces.With "Naglers" my aim is to approach the wide angle perspective of naked eye vision while maintaining the highest degree of sharpness contrast and viewing comfort. The goal is to allow the telescope to virtually "disappear " leaving the impact of "spacewalk" viewing. -Al NaglerFollowing are excerpts from the book The Backyard Astronomer by Dickenson & Dyer: "Al Nagler of Tele Vue caused a sensation when he introduced the Nagler in 1982. The Nagler's success can be attributed to two important innovations: an extremely wide apparent field of 82 degrees with outstanding sharpness and exceptionally comfortable eye relief for eyepieces of very short focal length...He designed his melding of eyepiece and Barlow to operate as a single unit; that is the aberrations of one cancel out the aberrations of the other producing exquisitely sharp images edge to edge over an unprecedentedly wide field of view. Nagler's background of optical-systems design for visual flight simulators and his interest in amateur astronomy created the perfect match for this breakthrough."Compare a penny to a half dollar to see the relative size between a 50 degree and 82 degree apparent field - almost 3 times the area difference! And while others boast of impressive apparent field sizes Tele Vue's philosophy of "showing no field unless it's fine" stresses full field image quality as the ingredient for impressive views. Blackened lens edges anti-reflection threads and rubber eyeguards deliver maximum contrast. Adapter skirts for 2" focusers on larger 1.25" models (12mm Nagler Type 4 and 22mm Panoptic) and rubber grip rings are additional
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May 09, 2011 16:36:03
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