The Canon Eg-D Precision Matte Focusing Screen with Grid is an interchangeable focusing screen compatible with the Canon EOS 5D-Mark II camera. This grid screen provides a 3-line (horizontal) by 5-line (vertical) etched grid which facilitates easier composition and horizon alignment. All the 5D-Mark II's AF points remain fully visible. Ideal for architectural use, close-up and copy work, and wide-angle outdoor photography.