Wikipedia
Televue Optical is a Chester (town), New YorkChester, New York-based astronomyastronomical optics corporationcompany known primarily for its premium brand of speciality eyepieceeyepieces and apochromatic refractor telescopes.Founded in 1980 by Al Nagler, an optical engineer who help built special closed-circuit television screenmonitors and cameras for the simulators used in the Project ApolloApollo program, the company is well known for its line of "Nagler," "Panoptic," and "Radian" eyepieces. Using different combinations of lenslenses of different types of glasses, the eyepieces produce a 60 (Radian), 68 (Panoptic), and 82 (Nagler)-degree field-of-view; the last giving the viewer a "spacewalk" experience, necessary in viewing galaxies and nebula. Although expensive to construct, Televue eyepieces are treasured by serious amateur astronomers, especially those who own large aperture Schmidt-Cassegrain and Dobsonian telescopes, and are used exclusively by professional astronomers at !College#United_States_of_Ameri cacollege and university observatories. Televue also manufactures Plossl (50-degree field of view) eyepieces, as well as special nebula filter (opticsfilters, barlow lenses, the "Paracorr" coma-corrector for "fast" (f/5 and below) telescopes, and the new "Dioptrix," a special lens that snaps over the eyepieces for the correction of astigmatism.In late 2004, rival company Meade introduced its new Series 5000 Plossl, Super Wide Angle, and Ultra Wide Angle eyepieces. These eyepieces are in many ways, direct copies of the Radian, Panoptic, and Nagler eyepieces respectively, the difference only being the price. Although the eyepieces are similar, the biggest difference is that Televue has more fixed magifications available for the Nagler, as well as a "zoom" (variable magnification) version, while all of Meade's Ultra Wide Angles have a fixed magnification.tech-corp-stub Category:Companies based in New YorkCategory:Telescope manufacturers