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Tele Vue

Ethos-SX 3.7mm 110° Eyepiece


  • 62800

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


Mars Madness Rebate Available!

Save now on this and other high-power eyepieces by Tele Vue in preparation for the upcoming Mars opposition. Follow the link below for the rebate form!

Tele Vue Mars Madness Rebate Form

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 3.7mm Ethos-SX 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. 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.

Specifications

 

3.7-mm
Model # ETH-03.7
Focal Length (mm) 3.7
Barrel Size (in.) 2" & 1¼"
Apparent Field of View (deg.) 110
Eye Relief (mm) 15
Weight (lb / oz) 1.10 / 17.6
Field Stop (mm) 7.04

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