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TeleVue - 3.7mm Ethos-SX Eyepiece

Model#:ETH-03.7

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Manufactured by: TeleVue

TeleVue - 3.7mm Ethos-SX Eyepiece

Details

TeleVue 3.7mm Ethos-SX Eyepiece

 

With 110°, the Ethos-SX has 21% more AFOV area than the 100° Ethos design. This permits a nice 62% power increase from a 6mm Ethos, while retaining 68% of its TFOV. The 3.7mm actually has more TFOV than our 8mm Plössl, 6mm Radian, and 5mm Nagler Type-6!

In 1¼" mode, it is parfocal with the wide range of 1¼" Tele Vue Plössls, Panoptics, Radians, Naglers, Nagler Zooms, and 6mm and 8mm Ethos eyepieces. The screw-on 2" adapter (included) is designed to make it parfocal with 13mm and 10mm Ethos when they are used in their 2" modes.

Product Series

Al Nagler eagerly pushed Ethos designer Paul Dellechiaie to extend the Ethos to reach 110°, the same field size as the LEM Simulator optics Al designed 45-years ago to train NASA astronauts for lunar landings.

With 110°, the Ethos-SX has 21% more AFOV area than the 100° Ethos design. This permits a nice 62% power increase from a 6mm Ethos, while retaining 68% of its TFOV.

In 1¼" mode, it is parfocal with the wide range of 1¼" Tele Vue Plössls, Panoptics, Radians, Naglers, Nagler Zooms, and 6mm and 8mm Ethos eyepieces. The screw-on 2" adapter (included) is designed to make it parfocal with 13mm and 10mm Ethos when they are used in their 2" modes.

Additional Information

Name TeleVue - 3.7mm Ethos-SX Eyepiece
Manufacturer TeleVue
Model ETH-03.7
Manufacturer Part No ETH-03.7
Apparent Field of View 110°
Eye Relief 15mm
Eyepiece Barrel Size 1.25" - 2"
Field Stop Diameter 7.04mm
Focal Length 3.7mm