With the TeleVue 31mm Nagler Type 5 Eyepiece, the unique 6-element design using four exotic glasses, maintains the contrast advancement while achieving a true field area 82% larger than the 22mm Type 4 TeleVue Telescope Eyepiece! Owners of fast Dobsonian/Newtonian telescopes can enjoy a larger true field, free of secondary shadowing, than ever before.

Compare a penny to a half dollar to see the relative size between a 50 degree and 82 degree apparent field - almost 3 times the area difference! And while other telescope eyepieces boast of impressive apparent field sizes, Tele Vue''s philosophy of "showing no field unless it''s fine" stresses full field image quality as the ingredient for impressive views. Blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast. Adapter skirts for 2" focusers on larger 1.25" TeleVue Telescope Eyepiece models and rubber grip rings are additional Tele Vue "firsts". Even 2"/1.25" barrel models have an additional feature allowing the 2" extension tube (EBX-2120) to be screwed on, which permits use of 2" TeleVue Eyepiece Filters as well as 1.25". 100% full field visual inspection on TeleVue''s own flat-field test instruments guarantees the performance of every TeleVue Telescope Eyepiece.

"You may know there''s a long history of naming telescope eyepieces after their designers: Kellner, Erfle and Plossl, to name a few. In the late 70''s I designed an eyepiece sufficiently radical that I dared attach my name to it. Even today, I must admit a little discomfort when talking about "Nagler" eyepieces.

With TeleVue Telescope Eyepiece "Naglers", my aim is to approach the wide angle perspective of naked eye vision, while maintaining the highest degree of sharpness, contrast, and viewing comfort. The goal is to allow the telescope to virtually "disappear," leaving the impact of "spacewalk" viewing." --Al Nagler

Be sure to check out our line of TeleVue Telescopes, TeleVue Telescope Mounts and TeleVue Telescope Accessories.

• Blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast

   

   

• Unique 6-element design using four exotic glasses

   

   

• Adapter skirts for 2" focusers on larger 1.25" models and rubber grip rings

   

   

• Maintains the contrast advancement while achieving a true field area 82%

   

   

• 100% full field visual inspection on TeleVue''s own flat-field test instruments guarantees the performance of every Tele Vue eyepiece

Focal Length (mm): 31

Barrel Size (in.): 2"

Apparent Field of View (deg.): 82

Eye Relief (mm): 19

Weight (lb / oz): 2.20 / 35.2

Field Stop (mm): 42

Warranty: Limited Lifetime