Tele Vue 17mm Ethos Eyepiece - 2" - ETH-17.0 Compact Binoculars Aperture (mm): 40 mm (1

Aperture (mm): 40 mm (1

or the equivalent of a 12

Works in both 1

25" Astro Filters

This combination of materials produces an effective cover system capable of providing years of protection

Tele Vue 17mm Ethos Eyepiece - 2" - ETH-17.0 Compact Binoculars Aperture (mm): 40 mm (1About the TeleVue 17mm Ethos Eyepiece 2" Tele Vue is known for its in house TeleVue Telescope Eyepiece and TeleVue Telescope designs by Al Nagler; and their latest telescope eyepieces 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