Tele Vue 22mm Nagler Type 4 Eyepiece - 2

$487.00
Article number: EN4-22.0
Availability: More on the Way to us
Delivery time: More on the Way to us
22-mm
Model # EN4-22.0
Focal Length (mm) 22
Barrel Size (in.) 2"
Apparent Field of View (deg.) 82
Eye Relief (mm) 19
Weight (lb / oz) 1.50 / 24.0
Field Stop (mm) 31.1
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Nagler Type-4 Eyepieces

Applying the experience of the Radian development to the 82° Nagler series, yielded more contrast, reduced pincushion, more true field, and longer eye-relief. 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, 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).

Type-6 models have shorter focal lengths, 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.

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