Pentax XW 10 SMC Eyepiece (1.25" Tube)The Pentax XW10 spotting scope eyepiece is a fixed focal length telescope lens designed to fit the Pentax 65 and 80 mm ED spotting scopes. The XW10 eyepiece has magnifications of 39x and 51x when mounted on the Pentax PF 65ED II and PF 80ED spotting scopes respectively. Made with the same ED glass as the scopes themselves, the XW10 eyepiece provides high resolution images with minimal distortion or chromatic aberration. The Pentax XW10 eyepiece is a