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.
|Name||TeleVue - 3.7mm Ethos-SX Eyepiece|
|Custom Stock Status||Ships in 3-5 Days|
|Apparent Field of View||110°|
|Eyepiece Barrel Size||1.25" - 2"|
|Field Stop Diameter||7.04mm|