Make an offer as it needs to go!

Hard to source/private import

Tele Vue eyepieces come in several variations and focal lengths to accommodate your particular preferences among the variables of size, weight, price, eyepiece distance, and apparent field of view. They are universally applauded by amateur and professional astronomers alike, and hold their resale value incredibly well.

3mm focal length Radian 1.25" eyepiece for comfortable viewing at the high power needed to study planetary and lunar detail as well as compact deep-sky objects Seven-element lens design exhibits the renowned Tele Vue quality, providing flat, sharp images over the entire 60deg apparent field Fully multi-coated for superior light transmission and threaded for use with 1.25" eyepiece filters Long 20mm eye relief The Instadjust click-stop eyeguard positions your eye right where you need it to see the full field of view, whether you wear glasses or not

Instadjust was developed for maximizing contrast while aiding in proper eye positioning for non-eyeglass wearers. It is essential, since with the Radian's long eye-relief, non-eyeglass wearers could easily get too close to the eyepiece, resulting in vignetting where edge field rays miss your pupil. The push-pull, click-stop adjustment permits fast positioning and maximum suppression of environmental stray light.

Another unique development is the Pupil Guide. It helps non-eyeglass wearers, especially novices, zero-in and stay centered on the exit pupil. The Pupil Guide is included with all Radian and Nagler Type 4s and fits under the soft, fold-down rubber eyeguard.

SPECIFICATIONS Capacity Focal length (mm) 3 Apparent field of view (°) 60 Eye relief (mm) 20 Number of lenses7 Type of buildPlanetary eyepieces Connection (to the telescope) 1,25" Coating of optical system multiple Special features Adjustable eyepiece cup yes (rotatable) Homofocal yes Filter thread yes

May have been used in our showroom

60 yrs experience in astronomy & optics;