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Tele Vue 10 mm Ethos 1.25"/2" Eyepiece with Free Case - ETH-100

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Includes a Free Eyepiece Case

Receive a free eyepiece case when you buy this Hyperion eyepiece from High Point Scientific! You will love the way the two piece “bolt-style” case threads together to securely protect your new eyepiece from dust, moisture, and scratches during storage.

Tele Vue 10 mm Ethos 2"/1.25" Eyepiece

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.

The 10 mm is parfocal with the 13 mm Ethos.The super wide field 100-degree eyepiece has a  59 mm rubber grip diameter that makes this Ethos usable in binocular viewers for most people. 

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. 

Tele Vue Ethos Eyepiece Specifications:

  • Focal Length: 10 mm

  • Barrel Size: 2", 1.25"

  • Apparent FOV: 100°

  • Eye Relief: 15 mm

  • Field Stop: 17.7 mm

  • Weight: 1.10 lb