Nagler 3-6mm Planetary Zoom Eyepiece

Open until 4:30pmIndependent shop in BallardDirections

Available from Cloudbreak Optics when we last checked, in the last two days. Sold from the shop’s own store; the price there is the one that counts.

Description Limiting the AFOV to 50° and the eye-relief to 10mm, TeleVue was able to create a compact physical design employing only five elements to reach the optical goals. Like other "Naglers," it utilizes a negative lens group ahead of the focal plane. This permits relatively long eye-relief for very short focal lengths. By independently moving the upper and lower lens group the eyepiece has constant focus (parfocality), constant apparent field of view, and essentially constant eye-relief. J