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Used Tele Vue 13mm Ethos Eyepiece - 1.25"/2" - Sold

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  • $439.00
  • Regular price $629.00

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  • This is a used eyepiece in excellent condition
  • Extremely sharp with true color
  • Amazing 100 degree apparent field of view!
  • Very comfortable to view through


Used Tele Vue 13mm Ethos Eyepiece - 1.25"/2" - Sold

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 13mm 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 Televue 13mm 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.

Televue is known for its in-house eyepiece and telescope designs by Al Nagler. Televue's latest eyepiece brings new meaning to the term 'in-house.' The concept for the 13mm Ethos eyepiece was first proposed by Televue 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 Televue 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 Televue 13mm Ethos eyepiece has now been shown at NEAF, TSP, RTMC, as well as other major astronomy events. The Televue 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.

TeleVue Product Number: ETH-13.0

All Televue 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 Televue product for warranty or repair.


Barrel Size1.25"/2"
Dust Caps IncludedYes
Eye Guard IncludedYes
Eyepiece Apparent FOV100 degrees
Eyepiece Eye Relief15mm
Field Stop22.3mm
Focal Length13mm
ManufacturerTele Vue
ModelTelevue Ethos
Warranty90 Day


  • 13mm Ethos eyepiece
  • Caps and original box*
  • * Half of inner foam missing