TeleVue Nagler Eyepieces

The incomparable TeleVue Nagler

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 1970s Al Nagler designed an eyepiece sufficiently radical that he dared attach his name to it. TeleVue Nagler eyepieces provide a tack sharp image across an extremely generous 82 degree apparent field. Nagler eyepieces have been enhanced and refined over the years, dominating the market for ultra-side field eyepieces for nearly three decades. When it comes to recommending the best telescope eyepiece for a specific application, we never hesitate to include the Nagler in our list of candidates.

Following are excerpts from the book The Backyard Astronomer by Dickenson & Dyer:

"Al Nagler of TeleVue 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."

The 12mm, 17mm, 22mm, 26mm and 31mm Nagler eyepieces are directly compatible with TeleVue's DIOPTRX astigmatism correcting lens system. All type 6 Nagler eyepieces may also accept the DIOPTRX when used in combination with a DNA-6000 adapter.