At NEAF 2008 we are pleased to demonstrate a new 8mm focal length, 100° AFOV Ethos eyepiece. 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. Further, its lighter weight and smaller diameter than the 13mm Ethos makes the 8mm suitable for anyone using a binocular viewer. Another application is for spotting scope set-ups with the Tele Vue 60° 1¼" diagonal. 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!
An important benefit of the combination of large apparent field of view and shorter focal
length is that for a given field in the sky, higher magnincation results in a darker sky
background. Fainter stars become visible and more detail is seen on all deep sky
objects. Ethos provides another big magnification/contrast jump, yielding dramatic views
simply not previously possible in any telescope. With the smaller exit pupil, eyesight
limitations are also reduced.
8mm 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.
- Apparent field: 100°
- Focal length: 8mm
- Effective field stop diameter: 13.9mm
- Eye relief: 15mm (accepts DIOPTRX eyesight astigmatism corrector)
- Barrel size: 2" / 1¼"
- Black barrel diameter: 53.4mm
- Weight: 0.95 lbs (15.2 oz.)