The HoodMAG 3.0 is designed to fit where the original HoodLoupe 3.0 eyecup or HoodEye3.0 was installed. Remove your existing eyecup from the HoodLoupe and simply mount new HoodMAG 3.0 by pushing it over the eyepiece.

HoodMAG has a slightly tighter fit than the original eyecup. The slip ring mounted within your HoodMAG eyecup will allow diopter adjustment without rotating the eyecup. Diopter adjustment remains the same, just turn the diopter ring left or right to set for your vision.