New Ethos SX 3.7mm with 110° field, the same as the LEM Simulator optics Al Nagler designed 45-years ago to train NASA Astronauts for lunar landings! Designed and crafted to combine its exceedingly wide field of view with all the contrast, colour-rendition, distortion correction and centre-to-edge sharpness you expect from Tele Vue.

Apparent field: 100°. Focal length: 6mm. Effective field stop: 10.4mm. Eye relief: 15mm (accepts DIOPTRX eyesight astigmatism correctors). Barrel size: 2"/1¼". Weight: .97 lb/15.5 oz.

In addition to matching all the key performance criteria of its 13mm sibling, the new 8mm version is parfocal in 1¼" focusers with Radians, Plössls, Type 6 Naglers and 1¼" Panoptics. Its lighter weight and smaller diameter than the 13mm Ethos makes the 8mm suitable for anyone using a binocular viewer. In comparing it to our 8-24mm Zoom eyepiece, the 8mm Ethos has the power of the 8mm Zoom and 83% of the field of the 24mm setting!

The 10mm Ethos delivers: 100° apparent field (50% larger in area than 82° Naglers), comfortable eye-relief, (accepts DIOPTRX eyesight astigmatism correctors), distortion correction, high contrast and on-axis sharpness for planetary viewing. It is the "do-it-all" eyepiece perfect for all scopes that can utilize this focal length. And, "filling the hole" between the 13mm and 8mm makes it the ideal centerpiece for a 17mm/10mm/6mm Ethos set.

In 2007 Tele Vue introduced a new observing experience; 100º of pure Tele Vue quality. With a 13mm focal length, the field area of this new eyepiece is more than 50% larger than an 82º field. The Tele Vue Ethos is essentially multiple eyepieces, delivering the true field size of a longer focal length, narrower apparent field eyepiece with the benefits of higher power and darker sky background.

Apparent field: 100°. Focal length: 17mm. Effective field stop: 29.6mm. Eye relief: 15mm (accepts DIOPTRX eyesight astigmatism correctors). Barrel size 2". Weight: 1.55 lbs (24.8 oz.).

Maximize your "spacewalk" experience with the 21mm Ethos. Transform your passage through the Milky Way with the 21mm's nexus of contrast, power and field. Larger deep sky objects and rich star fields are its natural playground. Looking on-axis your field-of-vision is filled with 100º of stars, however wherever you chose to concentrate your attention you'll see sharpness and richer contrast.