Comfortable Viewing and Detailed Observation The SEP-25 eyepiece is exclusively designed for the PROSTAFF 5 Fieldscope series and is ideal for detailed observation. Offering fully multilayer-coated lenses, long eye relief for viewing comfort with eyeglasses and a bayonet mount with lock for easy attachment and release. Water resistant when attached to Fieldscope body. Compatible with all 60mm or 82mm straight and angled PROSTAFF 5 Fieldscope bodies.