Orion 8200 3.6mm E-Series Telescope Eyepiece Turn up the magnifying power of your beginner telescope affordably with the 3.6mm Orion E-Series Telescope Eyepiece Quality 3.6mm focal length telescope eyepiece with fully coated glass optics Boost the magnifying power of your telescope without spending an arm and a leg 1.25" eyepiece barrel threaded for use with 1.25" Orion eyepiece filters