Tele Vue Ethos 17mm, 100° apparent field eyepiece


Available on backorder

Model # ETH-17.0
Focal Length (mm) 17
Barrel Size (in.) 2″
Apparent Field of View (deg.) 100
Eye Relief (mm) 15
Weight (lb / oz) 1.55 / 24.8
Field Stop (mm) 29.6
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With its exceptional 100° field of view, the Tele Vue Ethos 17mm Ultra Wide-Angle Eyepiece offers a comfortable eye relief with high contrast, excellent on-axis sharpness, and virtually zero astigmatism or field curvature.

This Tele Vue features anti-reflection fully multi-coated optics to improve brightness, color rendition, and contrast, and a fold-down rubber eyecup that helps to block stray peripheral light, avoiding interference with the views and further enhancing contrast. Combining a hyper-wide field of view with a long focal length, the eyepiece delivers moderate to low magnifications on most telescopes — offering expansive views of the night sky and an immersive observational experience. This eyepiece features a large 2″ barrel diameter to make it even more comfortable to view through and a textured rubberized grip for sure handling. An ideal companion to the 31mm Nagler Type-5 eyepiece, the 17mm Ethos is parfocal, requiring little to no refocusing when switching between the two. It is also compatible with the astigmatism-correcting DIOPTRX diopters to further improve the view.

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