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.

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.

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