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Tele Vue 1.25" Nagler Type 6 Eyepiece - 2.5mm

5.0 (1 Reviews) Read Reviews Write Review
Brand TeleVue
Part Number EN6-02.5
Availability available

Product Info

Manufacturer Description

The Tele Vue 2.5mm Type 6 Nagler eyepiece 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, TeleVue 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 Type 6 model, and all are sized about the same as the original 7mm!

The 2.5mm Nagler Type 6 is a natural progression of 1.4x from the 3.5mm Nagler. You don't have to sacrifice field in order to gain sharpness and power. And, you're not limited to slow scopes, or have to squint through tiny eye lenses. These are the lunar and "planetary" eyepieces with field to spare.

All Tele Vue Nagler eyepieces have proprietary tuned full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, rubber grip rings, cover for the eyeguard, an undercut in the barrel for extra locking security, and filter threads. All Tele Vue eyepiece lines are proprietary, in-house designs manufactured to their specifications and tolerances. Every eyepiece is individually tested at Tele Vue to ensure it meets high optical and cosmetic standards.

Take a "spacewalk" across a wide, sharp 82° apparent field
Compare a penny to a half dollar to see the relative size between a 50° and 82° apparent field - almost 3 times the area difference! And while others boast of impressive apparent field sizes, Tele Vue's philosophy of "showing no field unless it's fine" stresses full field image quality as the ingredient for impressive views. Blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast. Adapter skirts for 2" focusers on larger 1¼" models and rubber grip rings are additional Tele Vue "firsts". Even 2"/1¼" barrel models have an additional feature allowing the 2" extension tube (EBX-2120, sold separately) to be screwed on, which permits use of 2" filters as well as 1¼". 100% full field visual inspection on TeleVue's flat-field test instruments guarantees the performance of every Tele Vue eyepiece.

Concept: "You may know there's a long history of naming eyepieces after their designers: Kellner, Erfle and Plossl, to name a few. In the late 70's I designed an eyepiece sufficiently radical that I dared attach my name to it. Even today, I must admit a little discomfort when talking about "Nagler" eyepieces.

With "Naglers", my aim is to approach the wide angle perspective of naked eye vision, while maintaining the highest degree of sharpness, contrast, and viewing comfort. The goal is to allow the telescope to virtually "disappear," leaving the impact of "spacewalk" viewing." — Al Nagler

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, 12mmfocal length range.

Reviews

5.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      User Notes:
      Review by telescope tom of Tucson.
      1410048000
      Sep 6, 2014

      5.0 Really good for max power on Mars

      Pros:

      Quality Lenses

      Cons:

      Comments:

      For maximum power on Mars with a non tracking dob this is the best.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Specifications

      Apparent Field of View 82°
      Barrel Size 1.25" (31.7mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      Bolt Case Size Agena 52x80mm
      Coatings Fully Multi-Coated
      Max Width 1.6" (40.6mm)
      Eye Relief by Design 12mm
      Field Stop Diameter 3.4mm
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 2.50mm
      Lens Elements 7
      Lens Groups 4
      Parfocal Yes
      Rubber Eye Guard Yes
      Blackened Lens Edges Yes
      Additional Information

      - Suitable for use with Tele Vue Bino Vue binoviewer
      - Suitable for use with Tele Vue Dioptrx / digiscoping

      Manufacturer TeleVue
      Eyepiece Focal Length 5mm and Under
      Eyepiece Field of View Over 80 degrees
      Eyepiece Series Tele Vue Nagler
      Barrel Type With safety undercut
      Eyepiece Weight 8.70oz (246.64g)