Experience the pinnacle of optical excellence with  TV Ethos (1.25" & 2") 8mm. In the 1.25" mode, if you use Tele Vue's "high-hat" 2"-1.25" adapter with the 8mm Ethos, it will be parfocal with Tele Vue's Plossls, Radians, Type 6 Naglers, Nagler Zooms, 1.25" Panoptics and the 6mm Ethos. Further, its light weight and small diameter make the 8mm ideal for anyone using a binocular viewer. Designed to provide VISION TO INFINITY, this eyepiece offers unparalleled clarity and comfort for all astronomers. Embrace the ultimate in stargazing experience.