Ethos-SX 4.7mm 110° Eyepiece
Category: Eyepieces
Description
TeleVue founder, Al Nagler, eagerly pushed Ethos designer Paul Dellechiaie to extend the new 3.7mm focal length to reach 110°, the same field size as the LEM Simulator optics Al designed 45-years ago to train NASA astronauts for lunar landings.
The new 4.7mm Ethos-SX, like its 3.7mm progenitor, is designed and crafted to combine its exceedingly wide field of view with all the contrast, color-rendition, distortion correction and center-to-edge sharpness needed to achieve that natural view.
Compared to a lower power eyepiece with the equivalent TFOV (similar field stop) such as an 11mm Plössl (9.1mm field stop), the greater power - for higher resolution, and smaller exit pupil (for a darker background to enhance contrast) reveals a deep sky experience "even better than you imagined".
The 4.7mm is a 1¼" format and is parfocal with the wide range of 1¼" Tele Vue eyepieces. 2" adapter included.
Specifications
| 4.7-mm | |
| Model # | ETH-04.7 |
| Focal Length (mm) | 4.7 |
| Barrel Size (in.) | 2" & 1¼" |
| Apparent Field of View (deg.) | 110 |
| Eye Relief (mm) | 15 |
| Weight (lb / oz) | 1.30 / 20.8 |
| Field Stop (mm) | 8.94 |
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