Televue
From Wikipedia, the free encyclopedia
Televue Optics is a Chester, New York-based astronomical optics company known primarily for its premium brand of speciality eyepieces and apochromatic refractor telescopes.
Founded in 1977 by Al Nagler, an optical engineer who helped build special closed-circuit television monitors and cameras for simulators used in the Apollo program, the company is well known for its line of "Radian," "Panoptic," "Nagler" and "Nagler Zoom" eyepieces. Using different combinations of lenses of different types of glass, the eyepieces produce, respectively, a 60°, 68°, 82° and 50° apparent field-of-view. Televue calls the 82° apparent field-of-view a "spacewalk" experience. Wider apparent fields of view are helpful in viewing galaxies and nebulae.
Although expensive, Televue eyepieces are treasured by many amateur astronomers, especially those who own large aperture Schmidt-Cassegrain and Dobsonian telescopes, and are used by many professional astronomers at college and university observatories. [citation needed] Televue also manufactures Plossl (50° field-of-view) eyepieces, as well as special nebula filters, barlow lenses, the "Paracorr" coma-corrector for "fast" (f/5 and below) telescopes, and the new "Dioptrix," a special lens that snaps over eyepieces to correct astigmatism.
