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Tele Vue 17mm Ethos Eyepiece - 2"

SKU : TE-ETH-17.0

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Product Details

  • The Tele Vue 17mm Ethos Eyepiece with a 2" barrel is part of the Tele Vue Ethos Eyepiece Series. These eyepieces have pushed the boundaries of optical excellence and maximum field of view, creating an unrivaled eyepiece experience. An important benefit of the combination of large apparent field of view and shorter focal length is that for a given field in the sky, higher magnification results in a darker sky background. Fainter stars become visible and more detail is seen on all deep sky objects. The Tele Vue Ethos eyepiece provides another big magnification/contrast jump, yielding dramatic views simply not previously possible in any telescope. With the smaller exit pupil, eyesight limitations are also reduced. The Televue 17mm Ethos delivers a 100 degree apparent field (50% larger in area than 82 degree Naglers), comfortable eye-relief, accepts DIOPTRX eyesight astigmatism correctors, distortion correction, high contrast and on-axis sharpness for wide field planetary viewing. It is the 'do-it-all' eyepiece perfect for all scopes that can utilize this focal length.

    The International Year of Astronomy (2009) celebrated the 400th anniversary of Galileo's first use of an astronomical telescope. Continue to celebrate by showing friends and neighbors the best of our wonderful universe. The Tele Vue philosophy (Ethos, if you will) has always been about inspiring 'spacewalk' vistas by creating the finest 'rich field' refractors and wide angle eyepieces. We hope the introduction of these new Ethos models will further rekindle the appreciation of astronomy and support all the worthy goals of IYA 2009. It's been quite a challenge to develop new Ethos eyepieces to the same performance standards achieved by the 13mm and 8mm models, perhaps the most honored in history. We hope the increased field of the 17mm and increased power of the 6mm will open up new visual experiences that Galileo could hardly have imagined, from small refractors to the largest Dobsonian telescopes.


    OPT Product Number: TE-ETH-17.0


  • specifications

    Dust Caps IncludedYes
    Eye Guard IncludedYes
    Eye Relief15mm
    Field of View100 degrees
    Field Stop29.6mm
    Focal Length17mm
    Free ShippingYes
    WarrantyLifetime Warranty

Product Reviews

Customer Reviews
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Dhananjay N.
United States


A lot has been written about the wide field Ethos eyepieces. And all of that is true - it is genuinely a visual treat to see something in context. It is not the actual wide field itself - you have to move your head around to actually see that wide field, something you are unlikely to do when your interest is in the focal object. For me, the actual visual treat is that you do not get the 'looking down a microscope tube' effect of using the same magnification in narrow field designs. I find that makes you conscious of the equipment and kills immersion. In contrast, with the wide field of the Ethos, you have the experience of nothing in the way - almost like it was you suspended in space and watching this thing. Now if you did want to move your head around, you are going to be pleasantly surprised by how good performance out into the field is. It is also an optic that is very good at retaining contrast - with a narrowband filter, this eyepiece (compared to an Erfle type I compared it with) completely darkened the background sky while the other eyepiece still was a dark grey (I am in a somewhat light polluted area - I estimate around Bortle 5-6). You can read up the specs and pore over the resolution numbers etc. It is the immersion though - makes you spend more time at the eyepiece studying things.

New Zealand New Zealand

Fantastic Eyepiece

This is an amazing eyepiece and a fantastic addition to our 21mm Ethos. The apparent field of view is stunning and the quality to the edge of the field of view is brilliant. We use this eyepiece on a 16” reflector and the views far surpass anything we’ve used before.