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Tele Vue 3.7mm 2" & 1.25" ETHOS SX Eyepiece - Very Good Condition!

The concept for this eyepiece series was 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, 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 protégé 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. Sharp images are inherent to the optical design, but 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. Apparent Field of View is 110°.

Tele Vue Ethos Eyepiece Specifications:

  • Focal Length: 3.7 mm

  • Barrel Size: 2", 1.25"

  • Apparent FOV: 110°

  • Eye Relief: 15 mm

  • Field Stop: 7.04 mm

  • Weight: 1.10 lb

We got this high quality eyepiece in as a trade. Optics have been professionally cleaned & tested. Optics are excellent. Cosmetically, there is a small ding under the eyecup that will not affect the view. Comes with both original caps & the box.If the small cosmetic issue doesn't concern you, buy this one from us and save $$!Please contact us thru ebay if you have any questions - we are here to help!Price includes USA shipping.We ship promptly, usually the same day - check out our feedback!Thanks!

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Filed under: Eyepieces & Accessories