Tele Vue 4.7mm Ethos-SX 1.25" with 110 Degree Apparent Field of View, with 2" Eye Adapter

Tele Vue
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About Tele Vue 4.7mm Ethos-SX 1.25""

Al Nagler eagerly pushed Ethos designer Paul Dellechiaie to extend the 3.7mm focal length to reach 110°, the same field size as the LEM Simulator optics Al designed years ago to train NASA astronauts for lunar landings.

The 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 Pl"ssl (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. A2" adapter is included.

Tele Vue 4.7mm Ethos-SX 1.25"" Specifications

Focal Length
Barrel Size
1-1/4" / 2" Adapter (included)
Apparent Field of View
110 deg
Eye Relief
15mm (accepts DIOPTRX eyesight astigmatism corrector)
Field Stop
Effective Diameter: 8.94mm
1.30 lbs / 20.8 lbs
Mfr #
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