Specifications:12 mm Focal LengthBarrel Size (in.) 2" and 1.25"Apparent Field of View (deg.) 82Eye Relief 17mmWeight 1.01 lb.
This eyepiece is like new condition, used only 2 or three times before I came down with health issues. It has no known defects and I am the original owner, bought new.The Televue 12mm Nagler Type 4 eyepiece is a 6-element design with more true field than the Type 2 and better imaging and contrast enhancement.
The Televue 12mm Nagler Type 4 has blackened lens edges, anti-reflection threads and rubber eyeguard delivers maximum contrast.
With 17 mm eye-relief, the click-stop Instajust eyeguard helps maintain proper eyedistance and centration. A pupil guide is included for those who prefer to use it.
Users confirm that for deep sky viewing, the comfort, clarity and contrast of the Type 4 gets Tele Vue closer to their "spacewalk" viewing goal.
Filed under: Eyepieces & Accessories