At NEAF 2008, Tele Vue demonstrated a new 100 degree AFOV Ethos eyepiece in an 8mm focal length. In addition to matching all the key performance criteria of its 13mm sibling, the new Tele Vue 8mm Ethos is parfocal in 1.25" focusers with Radians, Plossls, Type 6 Naglers and 1.25" Panoptics. Further, its lighter weight and smaller diameter than the Tele Vue 13mm Ethos makes the 8mm Ethos suitable for anyone using a binocular viewer. Another application is for spotting scope set-ups with the Tele Vue 60 degree 1.25" diagonal. In comparing it to their 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 magnification results in a darker sky background. Fainter stars become visible and more detail is seen on all deep sky objects. The 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.
The Tele Vue 8mm Ethos delivers: 100 degrees apparent field (50% larger in area than 82 degree 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.
Tele Vue 8mm Ethos Specifications
- Apparent Field of View - 100 degrees
- Focal Length - 8mm
- Effective Field Stop - 13.9mm
- Eye Relief - 15mm (accepts DIOPTRX eyesight astigmatism corrector)
- Barrel Size - 2"/1.25"
- Weight - 0.95lbs.
