MA501 Super Widefield 5X Eyepiece designed for EMZ, EMT, EMF models Super Widefield Eyepiece 5X (pair) Field No. 26.0, Eye Relief 15.0, Focal Length 50.0 with 30.5mm O.D. (Outer diameter). This 5X Super Widefield Eyepiece is designed to fit our Meiji Techno models EMZ (Zoom Series) , EMT (Turret Series) , EMF ( Fixed Series), not compatible with High Eyepoint Models.