Tele Vue 21mm Ethos Eyepiece - 2" - ETH-21.0 Eyeguard Extender Compatibility: 2" TeleVue 2X Powermate

Compatibility: 2" TeleVue 2X Powermate Barlow

Full multicoatings for greatest light transmission and contrast

Field Stop (mm): 30

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 Compatibility: 2" TeleVue 2X PowermateAbout 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