An idea 45 years in the making
Photo courtesy of Tele Vue

Astrononmy Products

Practicing lunar landings and Command Module docking in the Lunar Excursion Module (LED) simulator, the Apollo astronauts had a 110 degree field of vision peering out of the craft's signature triangular windows. The optical system providing that view was designed by Tele Vue founder, Al Nagler. Years later, that simulator experience inspired him to design the 82 degree apparent field eyepieces bearing his name. With edge-to-edge sharpness even in fast scopes, no prior “widefield” eyepiece produced such a natural looking star field. One early user dubbed it the “spacewalk” eyepiece.

At 110 degree, the new 3.7mm focal length Ethos-SX is nothing short of the “Simulator experience” brought to your observing. Compared to eyepieces with equivalent true-fields-of-view, the 3.7mm focal length produces darker sky backgrounds allowing fainter stars to reveal themselves. With a 110 degree AFOV, it's a globular cluster busting, lunar roving, planetary exploring eyepiece like no other.

Yet, like every Tele Vue eyepiece, Ethos-SX is a proprietary Tele Vue design, using the highest specification glasses, glass-matched multi-coatings, and stray light suppression techniques honed over thirty years of pushing the eyepiece envelope. Try the Ethos-SX and get in the experience.