Tele Vue Nagler 7mm Type 6 EN6-07.0 RARE 08382 USA HTF A 09029 PO 40153 Eyepiece

Description

Description
Tele Vue Nagler 7mm Type 6 EN6-07.0 RARE 08382 USA HTF A 09029 PO 40153 Eyepiece
What is pictured is what's included.
Please see our other listings, as we have more Tele Vue items up for sale at this time.
**From the manufactures website:
Model Number: EN6-07.0
Focal Length: 7mm
Barrel Size: 1 1/4"
Apparent Field of View: 82°
Eye Relief: 12mm
Weight: 1/2lb/ 8.0oz.
Field Stop: 9.7mm
Nagler Type 6
The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials, coating processes and design ingenuity, Al has massaged more eye-relief, contrast, and true field of view into the shorter focal length Naglers, while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model, and all are sized about the same as the original 7mm. Weighs about 0.4 to 0.5 lbs.
Concept: The goal we set designing these new eyepieces was to increase contrast, maintain or increase eye-relief, reduce size and weight, and maintain the sharpness of the originals. They are all par-focal and great with the Bino Vue.
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.)
The 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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