21mm Tele Vue Ethos Telescope Eyepiece
Item #08355
5.0 / 5.0
Free Standard Shipping
$903.99
The 21mm Tele Vue Ethos Eyepiece delivers the true field of a longer focal length, narrower apparent field telescope eyepiece with the benefits of higher power and darker background. High contrast images are incredibly sharp across the entire field.
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This item is on backorder and expected by 04/08/2024.
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  • More Info
    • Eyepiece focal length of 21mm for great views of vast areas
    • Apparent eyepiece field of view of 100deg makes you feel like you're taking a spacewalk
    • Comfortable eye relief of 15mm
    • Effective field stop diameter: 36.2mm
    • 2" telescope eyepiece barrel

    Maximize your -inchspacewalk-inch experience with the 21mm Tele Vue Ethos Telescope Eyepiece. Transform your passage through the Milky Way with this telescope eyepiece's nexus of contrast, power and field. Larger deep sky objects and rich star fields are its natural playground. Looking on-axis, your field-of-vision is filled with 100 degree of stars; however, wherever you choose to concentrate your attention, you'll see sharpness and richer contrast.

    Extending the Ethos' focal length range to 21mm while maintaining the original performance goals of the rest of the series brings the eyepiece up against the mechanical limits of the 2-inch barrel and focus constraints. The 21mm provides the maximum true field of view, has no significant vignetting at the edge of the field, and is parfocal with the 31mm Nagler Type 5.

    Like all Tele Vue etelescope yepieces, every 21mm Ethos goes through optical and cosmetic quality control procedure in Chester, NY. Since all Ethos models accept DIOPTRIX, you now also have the -inchfinal frontier-inch – the ability to compensate for your own eyesight astigmatism with a superb multi-coated lens providing your exact correction, rotation orientation and centration over the eyepiece.

    Warranty

    This product is serviced and supported by its manufacturer according to the terms and conditions included in the packaged product. Orion's limited warranty does not apply. Please contact the manufacturer directly for technical support.

    Warning

    Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

  • Specs
    • User level:
      Advanced
    • Design:
      Proprietary
    • Eyepiece focal length:
      21.0mm
    • Barrel size:
      2"
    • Apparent field of view:
      100.0°
    • Eye relief:
      15.0mm
    • Coatings:
      Fully multi-coated
    • Filter threads:
      Yes
    • Parfocal:
      No
    • Field stop diameter:
      36.2mm
    • Barrel security recess:
      Yes
    • Blackened lens edges:
      Yes
    • Rubber eyeguards:
      Yes
    • Body material:
      Aluminum
    • Case:
      No
    • Weight (oz.):
      36
    • Additional included accessories:
    • Other features:
    • Warranty:
      Limited lifetime
  • Important Shipping Information

    Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

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