Tele Vue 21mm Ethos Eyepiece - 2" - ETH-21.0 Eyeguard Extender Field Stop (mm): 30

Field Stop (mm): 30

Compatibility: 2" TeleVue 2X Powermate Barlow

25" eyepiece

Linear Field of View (@1000 m): 56 m (184 ft)

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

Tele Vue 21mm Ethos Eyepiece - 2" - ETH-21.0 Eyeguard Extender Field Stop (mm): 30About 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