Tele Vue Ethos SX 3.7mm Eyepiece

$1,299.00

AUD Price shown includes GST
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SKU: ETH-037
Conditionnew

 



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    Tele Vue is known for its in-house eyepiece and telescope designs by Al Nagler; the development of the Ethos series brings new meaning to the term “in-house.” 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 colour, 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.

    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.

    Tele Vue Ethos SX 3.7mm Specifications

    Focal Length

    3.7mm

    Apparent Field

    110°

    Eye Relief

    15mm

    Effective Field Stop Diameter

    7.04mm

    Barrel Size

    2″ / 1.25″

    Weight

    499g

    Introduced at the 2007 Northeast Astronomy Forum, Tele Vue once again broadened the amateur astronomer’s perspective on the universe with: 100° of pure Tele Vue quality. The field area of this new eyepiece is more than 50% larger than an 82° field. The Tele Vue Ethos 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.

    We invited NEAF attendees to take a look and see the universe the way we think it was meant to be experienced, with a field of view incredibly wide and sharp! We were very pleased indeed by the response and validation of our design goals.

    Related Links

    Eyepiece Distortion
    Technical reference on rectilinear and angular magnification distortion.

    Majesty Factor
    Compare eyepieces by quantifying contrast, power, and apparent field.

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