It features a magnification factor of two, and a diopter adjustment wheel for tuning the finder to your eye. The flip-up frame slides onto the viewfinder and locks into place. When you want to flip the Z-Finder up and out of the way without removing it, you flip the red lever at the bottom of the frame. A custom-designed and built 40mm optic magnifies the camera’s screen, and the rubber eyecup allows you to press your eye comfortably against the viewfinder for added stability when shooting handheld.