Product details:
Designed for use with the Pentax PF-65ED and PF-65EDA spotting scopes, the SMC XF8.5 Eyepiece features multi-coated optical elements, an American-standard 31.7mm (1.25 inch) sleeve and focal length ideal for outdoor viewing and bird watching. The XF8.5 is a standard unifocal eyepiece, offering a focal length 8.5mm and a magnification of 46 times with a 60-degree apparent field of view and a long 18mm eye relief. It also features an extendible eyepiece ring with four click-stop positions. This eyepiece also comes with a filter-mounting screw and an adapter-mounting screw.