Al Nagler (1935–2025)

Albert H. Nagler, a pioneer of telescope optics, passed away at the office of his company Tele Vue Optics on Monday, October 27th. He was 90 years old.

Nagler was born and raised in the Bronx, New York. His interest in astronomy was sparked by a visit to the Hayden Planetarium. He attended the Bronx High School of Science, during which time he built his first telescope: an 8-inch f/6.5 Newtonian reflector with a hexagonal tube, which rode on an iron-pipe equatorial mount. It earned him an award when he graduated in 1952. After high school, he worked various and sometimes ill-suited jobs to support his family.

In 1955, Nagler published an article in the magazine Mechanix Illustrated describing the design and construction of his 8-inch telescope, marking the first time he received payment for work related to telescopes and astronomy. That article gave him the confidence to pursue a career in optics and it helped land him a job at Farrand Optical Company. Around the same time, he began attending the Stellafane Telescope Makers Convention in Springfield, Vermont, and won third prize in the Mechanical Excellence category for his 8-inch Newtonian.

Nagler really broke into the field of optics during his employment at Farrand Optical, which was contracted by NASA to develop visual simulators for astronauts training to land on the Moon. Nagler designed infinity displays for both the Gemini program and the Apollo Lunar Module spacecraft, which were used for simulating docking, navigation, and ultimately landing on the Moon. His work at Farrand later inspired his groundbreaking eyepiece designs as well as other products.

In 1969, Nagler completed his Bachelor of Science degree in Physics through night courses, which led him to leave Farrand to take a position as Chief Optical Engineer at Keystone Camera Co., where he designed a zoom lens for the company’s pocket camera.

In 1977, Nagler, together with his wife Judi, founded Tele Vue Optics, Inc., initially a side project for which they designed and marketed projection television lenses. It was here that Nagler developed his first wide-field eyepieces, which went on to change the entire industry of telescope eyepieces in the 1980s. Until Nagler’s well-corrected, wide-field designs, telescope oculars were essentially an afterthought. He showed the amateur community that the quality of an eyepiece is just as important as the quality of a telescope main optics— he often used the analogy that the eyepiece is just as important to a telescope as a camera lens is to a camera. In doing so, he revolutionized the entire eyepiece industry. He showed the astronomy industry that amateurs were willing to pay a premium for excellent oculars that can help them achieve the best views from their instruments. Today, seasoned observers covet his eyepieces, and most amateurs strive to own at least one Tele Vue eyepiece. Almost every eyepiece manufacturer in business today stands on the shoulders of Nagler's work.

It's difficult to convey how much Al Nagler has brought to the amateur community, and also how much he gave back to it. In addition to his innovations at Tele Vue, Nagler continued to attend trade shows, conferences, and particularly the Stellafane Telescope Maker’s Convention, where he was awarded the 2025 Astronomical League Award this past July. He was always generous with his time and knowledge and was always happy to share the view through his wonderful optics.