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Orion Telescopes

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21mm Tele Vue Ethos Telescope Eyepiece
$824.99
 
Accepted Payment
In Stock
  • 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


Learn more
Item #  08355
Mfg Model #  ETH-21.0

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.

  • 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
  • Warranty
    Limited lifetime

Orders received by 1pm Eastern Time for in-stock items ship the same business day. Orders received after 1pm 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.

I am considering the 13mm Ethos for a Meade EXT-LS, can this scope safely support the weight of this lens?
The mount of the ETX-LS can handle the weight of the 13mm Ethos eyepiece.

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