18mm Ultima Edge Eyepiece (1.25")18mm parfocal Ultra Flat Field eyepiece designed for 1. 25 focusers Incredibly crisp views from center to edge of field Fully multi coated, 8 element lens design for excellent light transmission Wide 65 apparent field of view allows you to see more of the night sky Generous 20mm eye relief and fold down rubber eyeguard for comfortable viewing with or without eyeglasses Molded rubber grip ring for non slip handling Description See the whole picture