Products
Televue 2-4mm Nagler Click Zoom 1.25"
- $812.00
Enquire for more information or email us specifics at sales@astro.com.sg.
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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.
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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