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Tele Vue 13mm Ethos Eyepiece - 1.25" & 2"

SKU : TE-ETH-13.0

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The Tele Vue 13 mm Ethos Eyepiece for both 1.25" and 2" barrels is part of the Ethos Series delivering a 100 degree field-of-view.


Product Details

  • The Tele Vue 13 mm Ethos Eyepiece for both 1.25" and 2" barrels is part of the Ethos Series delivering a 100 degree field-of-view. 

    At the 2007 Northeast Astronomy Forum in New York, Tele Vue introduced attendees to a new observing experience with personal views through the new Ethos. With a 13 mm focal length evoking the original 'Nagler' revolution, the field area of this new eyepiece is, at 100 degree, more than 50% larger than an 82 degree field. The Tele Vue 13 mm Ethos eyepiece is essentially multiple eyepieces, delivering the true field size of a longer focal length, narrower apparent field eyepiece with the benefits of higher power and darker sky background.

    Tele Vue Optics is known for its in-house eyepiece and telescope designs by Al Nagler. Tele Vue's latest eyepiece brings new meaning to the term 'in-house.' The concept for the 13 mm Ethos eyepiece was first proposed by Tele Vue President David Nagler, with performance parameters giving it the fundamental characteristics (the ethos) of a Tele Vue eyepiece: high contrast, comfortable eye relief and full field sharpness. Control of astigmatism, field curvature, lateral color, angular magnification distortion correction (technical reference), and low pupil sensitivity for daytime use were specified criteria.

    Following Tele Vue's philosophy of pushing the state of the art, long-time Tele Vue employee and optical design protege Paul Dellechiaie took up the challenge and designed the basic eyepiece form. Under Al's guidance, Paul tweaked his design to fulfill the original goals. While sharpness is inherent to the optical design, contrast is maximized through the intelligent use of flat finished baffles and ultra low reflectance, high efficiency coatings tuned to the composition of each element.

    The Tele Vue 13 mm Ethos eyepiece has now been shown at NEAF, TSP, RTMC, as well as other major astronomy events. The Tele Vue Ethos has been extremely well received by the astronomy community and will be one of the most highly anticipated products to be released in years.

    Since it is designed as an 1.25" eyepiece, there is NO optical benefit by using a 2" holder, however, there is a 2" barrel is included just for convenience. The holder is also threaded to accept our Tele Vue's 2" extension tube, which allows the use of 48 mm filters.


    OPT Product Number: TE-ETH-13.0


    All Tele Vue products are available to ship world-wide from OPT, and effective July 1, 2008, are covered by a Five Year Worldwide Limited Product Warranty! Always be sure to save your original packaging materials should you need to return any Tele Vue product for warranty or repair.


  • specifications

    Dust Caps IncludedYes
    Eye Guard IncludedYes
    Eye Relief15mm
    Field of View100 degrees
    Field Stop22.3mm
    Focal Length13mm
    Free ShippingYes
    WarrantyLifetime Warranty
  • included items

    The Tele Vue 13 mm Ethos Eyepiece for both 1.25" and 2" barrels is part of the Ethos Series delivering a 100 degree field-of-view.


Product Reviews

Customer Reviews
4.8 Based on 8 Reviews
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Filter Reviews:
    William D.
    United States United States

    Overrated and overpriced

    Not worth the cost. Get a 24mm Panoptic with a 2x Barlow and you will be happier.

    Patrick s.
    United States United States

    Ethos 13 mm eyepiece

    My overall experience was excellent as OPT gave great service and the Ethos gives beautiful views.


    Wonderful eyepiece!

    I got this eyepiece as a gift. I almost could not believe. This eyepiece is great. To own it means many nights of deep observing pleasure. I could recommend it to all who could afford it.



    The best eyepiece I've every used. The 1.25 mount with optional 2 adapter means I can use it on any scope, from my personal 150mm refractor to the 14 at the local astronomy club. Great clarity and brightness.


    Customer review

    What can I say that has not been said? One heck of an eyepiece. I took this baby down to the Everglades the other night and I felt like jumping into the eyepiece. The sky was so black, the stars so sharp, the FOV, endless. M42 was breathtaking, my best view ever!!! Cant wait to get another one to attempt binoviewing with them.


    Redefining the ethos of an eyepiece......

    1. Always center an object for the best view. 2. The field edge is only good for framing the object. 3. Eyepieces >70 deg FoV are mega-ultra-hyper-uber wide angle. Accept that compromise in edge quality. How times change!