Tele Vue 18mm Radian 1.25" Wide Angle Eyepiece with 60 Degree Field of View & Long Eye Relief.

SKU: TV18R

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2007-02-04T19:00:00

Rated 5 out of 5

Excelent definition

Sharp edge to edge. I use it with my C8 and a Tak FS102 and works perfect with both. Very confortable eye relief (I use eyeglasses). Wide apparent field of view. Compared to a 15 mm Plössl it shows dimmer stars, and doesn't elongate stars at the edge. Very nice eyepiece.

Jesus M.

About Tele Vue ERD180 18mm Radian 1.25in Eyepiece 60deg View

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Excelent definition

By Jesus M.

Sharp edge to edge. I use it with my C8 and a Tak FS102 and works perfect with both. Very confortable eye relief (I use eyeglasses). Wide apparent field of view. Compared to a 15 mm Plössl it shows dimmer stars, and doesn't elongate stars at the edge. Very nice eyepiece.

By limiting the field to 60 deg. (a Radian = 57.3 deg.) and establishing a uniform 20mm eye-relief, Tele Vue reworked the Nagler concept using the latest glass types to achieve optimum full field sharpness, freedom from distortion, freedom from ghosting (for critical planetary viewing) along with a unique adjustable eyeguard assembly which Tele Vue calls "Instadjust"

Instadjust was developed from the need for proper eye position for non-eyeglass wearers. It is essential, since with Radian's long eye-relief, non-eyeglass wearers would easily tend to get too close to the eyepiece, resulting in vignetting the field, just as you would moving out from the exit pupil. The click-stop, Instadjust eyeguard permits fast, accurate positioning of the eye to the exit-pupil with maximum suppression of environmental stray light. Instadjust is topped off by a soft (for comfort and eyeglass protection) fold-down rubber eyeguard and protective cap.

Usual Tele Vue features such as full multicoating, blackened lens edges, parfocalization, and grip-ring complement the Radian line.