Tele Vue 21mm Ethos Eyepiece - 2" - ETH-21.0 Eyeguard Extender You no longer have to

You no longer have to constantly shift a Dobsonian to keep objects centered for sharp viewing

25" eyepiece

Compatibility: 2" TeleVue 2X Powermate Barlow

Linear Field of View (@1000 m): 143 m (469 ft)

The rubber eyecups position your eyes at the perfect distance from the optics for a full field of view

Tele Vue 21mm Ethos Eyepiece - 2" - ETH-21.0 Eyeguard Extender You no longer have toAbout the TeleVue 21mm Ethos Eyepiece 2" Tele Vue is known for its in house telescope eyepiece and TeleVue Telescope designs by Al Nagler; and their latest TeleVue Telescope Eyepiece brings new meaning to the term "in house." The concept for this TeleVue Telescope Eyepiece series was proposed by Tele Vue President David Nagler, with performance parameters giving it the fundamental characteristics (the ethos) of a TeleVue Telescope Eyepiece: high