Tele Vue 16mm Nagler Type 5 Eyepiece
TeleVue Nagler Eyepieces
"You may know there's a long history of naming eyepieces after their designers: Kellner, Erfle, and Plossl, to name a few. In the late '70s 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 '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
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 others 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 inch focusers on larger 1.25 inch models (12mm Nagler Type 4 and 22mm Panoptic) and rubber grip rings are additional Tele Vue "firsts". Even 2 inch/1.25 inch barrel models have an additional feature allowing the 2 inch extension tube (EBX-2120) to be screwed on, which permits use of 2 inch filters as well as 1.25 inch. 100% full field visual inspection on our own flat-field test instruments guarantees the performance of every Tele Vue eyepiece.
Televue Nagler Type 5 Eyepieces: With the 31mm, the unique 6-element design using four exotic glasses, maintains the contrast advancement of the Type 4s while achieving a true field area 82% larger than the 22mm Type 4! Owners of fast Dobsonian/Newtonians can enjoy a larger true field, free of secondary shadowing, than ever before. For example, a 12.5 inch, f/4.5 scope with a Paracorr will deliver a 1.5 degree field (3 Moon diameters), at 53x with a 6mm exit pupil. Use our eyepiece calculator to figure out what the 31mm will deliver on your scope.
The 16mm Nagler Type 5 is a scaled down version of the "king of the field," 31mm. The 16mm is a smaller, lighter (0.45 lbs.), 1.25 inch only, 6-element design which replaces the 8-element 16mm Nagler Type 2. This exciting little high contrast eyepiece looks like a 19mm Panoptic, but packs the visual impact and sharpness we all expect from the 82 degree Nagler series. This eyepiece offers owners of 1.25 inch only scopes the largest possible true field in an 82 degree apparent field eyepiece. Great for small scopes and Bino Vues.
OPT Product Number: TE-EN5-16.0
|Dust Caps Included||Yes|
|Eye Guard Included||Yes|
|Eye Relief||10mm or Less|
|Eyepiece Apparent FOV||82 degrees|
|Eyepiece Eye Relief||10mm|
|Eyepiece Focal Length||5mm|
|Lens Elements & Groups||6 elements|
Near Perfect Eyepiece
It is difficult to imagine how TeleVue was able to get so much performance in so small a package. Remarkably little pincushion, perfect edge-to-edge performance. The only reason for 4.5 stars vs. 5 stars: the eye relief is *very* close, certainly less than is claimed. Eyeglass wearers simply cannot use this eyepiece. But, it is worth removing the eyeglasses, and letting your eyelashes touch the surface (they just will, in order to experience the near optical perfection of this eyepiece. It does out-perform the 17mm T4, which exhibits slightly less edge performance than the 16mm T5, but is *much* more comfortable to use.
Near excellent eyepiece
This eyepiece is a crowd pleaser! Excellent for viewing globular clusters and galactic clusters.Slight pin cushion effect barely noticeable. It is the work- horse in my eyepiece set out of ten.