Newsletter

TeleVue 17mm Nagler Type 4

17mm Eyepiece.  All Tele Vue eyepieces listed have full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, and filter threads. They are all based on patented designs by Al Nagler and are individually tested to be diffraction limited on-axis.

EN4-17.0
$388.99
Nagler Type-4 Eyepieces

Applying the experience of the Radian development to the 82° Nagler series, yielded more contrast, reduced pincushion, more true field, longer eye-relief, and fewer elements. With added eye-relief, the click-stop Instadjust eyeguard helps maintain proper eye distance and centration.

For deep sky viewing, the comfort, clarity and contrast gets us closer to our "spacewalk" viewing goal.

Why Are There 3 Types of Naglers?

To achieve the full magnification range over 82° apparent field of view requires two types: Nagler Type-5 with focal lengths of 31, 26, 20, 16mm and Nagler Type-6 with focal lengths of 13, 11, 9, 7, 5, 3.5, 2.5mm.

The Type-5 permits the largest true field possible (31mm has 42mm field stop), while the shorter focal length Type-6 models are parfocal, with similiar size and weight and all with a comfortable 12mm eye relief.

The Type-4 models feature about 18mm of eye relief and with the "instajust" eyeguard are best for eyeglass wearers or Dioptrx users in their 22, 17, 12mm focal length range.

17-mm
Model # EN4-17.0
Focal Length (mm) 17
Barrel Size (in.) 2"
Apparent Field of View (deg.) 82
Eye Relief (mm) 17
Weight (lb / oz) 1.60 / 25.6
Field Stop (mm) 24.3
Customers who bought this item also bought

TeleVue 4x 2.0" Powermate

4x Powermate 2" with brass clamp ring and 1.25" adapter.

PMT-4201
$305.99

TeleVue 27mm Panoptic

Housed in a 2" barrel like the 35mm, the 27mm is lighter & smaller. It`s perfect for any telescope size, type or speed, where a little more magnification is desired, yet still allows full field viewing with eyeglasses. For example, with the Genesis sdf, it gives 20x and a true field over 3 degrees.

EPO-27.0
$327.99

TeleVue 35mm Panoptic

The 35mm has the largest true field with plenty of eye relief for eyeglass wearers.  When combined with a Paracorr to correct the coma of an f/4.5 Newtonian, performance is spectacular across the 68 degree field. Imagine, sharp star clusters at the extreme edge of the field!

EPO-35.0
$366.99