This is a complete electronic viewfinder with a diopter. It includes the EVF Flip model and an optical viewfinder, which will snap onto the frame on the monitor and can flip up 180 degrees. The optical viewfinder contains high quality 2.5x optics with anti-fog shields and a diopter. The anti-fog is extremely important for reducing fog. It will also include extender frames. The Z-Finder Extender Frames allow you to further adjust the focal point of the Z-Finder by semi-permanently stacking the frames via a snap fit on to the skirt of the Z-Finder until the LCD screen is in focus for you.