HoodEYE for CANON SQUARE EYEPIECESHoodEYE links your eye to the camera by comfortably sealing out ambient light. You can easily upgrade your camera eyepiece in just a few seconds. Features: -Screw in mount keeps HoodEYE securely on your camera -Self -locking mount keeps HoodEYE in place -Rotates to accommodate right or left eyed shooters -Hypoallergenic silicon rubber eyecup