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TeleVue - 3.7mm Ethos-SX Eyepiece

Model#: ETH-03.7

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Regular Price: $650.00

Special Price: $585.00

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Manufactured by: TeleVue

TeleVue - 3.7mm Ethos-SX Eyepiece

Details


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.



Ethos-SX 3.7mm Specifications:



  • Apparent field: 110°

  • Focal length: 3.7mm

  • Effective field stop:7.04mm

  • Eye relief: 15mm (accepts DIOPTRX eyesight astigmatism correctors)

  • Barrel size 2”/1.25”

  • Weight: 1.10 lbs (17.7 oz.)

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
Eyepiece Apparent FOV 110
Eyepiece Apparent FOV2 0
Eyepiece Barrel Size 1.25" - 2"
Eyepiece Eye Relief 15
Eyepiece Eye Relief 2 0
Eyepiece Field Stop 7.0
Eyepiece Focal Length 3.7
Eyepiece Focal Length2 0.0
Eyepiece Elements 0