Televue 2-4mm Nagler Click Zoom 1.25"

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Televue 2-4mm Nagler Click Zoom 1.25"

ENZ-0204

  • $811.25

Enquire for more information or email us specifics at sales@astro.com.sg.

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Nagler Zooms
Zoomable 50° Constant Apparent Field Eyepieces
4 - 2-mm
Model # ENZ-0204
Focal Length (mm) 4 - 2
Barrel Size (in.) 1¼\"
Apparent Field of View (deg.) 50
Eye Relief (mm) 10
Weight (lb / oz) 0.36 / 5.7
Field Stop (mm) 3.3 - 1.7

The 2-4mm Nagler Zoom is recommended for fast, high performance scopes of 800mm focal length or shorter, such as the Tele Vue-60. It has click-stops every half-mm.

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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