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TeleVue 3.7mm ETHOS-SX Eyepiece

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Manufacturer: TeleVue
MPN: ETH-03.7
SKU: ETH-03.7
Last price was: $658.00
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Tele Vue 3.7mm Ethos-SX (Simulator eXperience)
Worlds 1st Astronomical Eyepiece with 110° Apparent Field

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 1.25" mode, it is parfocal with the wide range of 1.25" 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.

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