Televue 22.0mm Nagler Type 4 -2"

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Televue 22.0mm Nagler Type 4 -2"

EN4-22.0

  • $839.25


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Nagler
82° Apparent Field Eyepieces
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

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.



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