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 iis af points remain fully visible type d focusing screen provides a 3 line by 5 line etched grid all the 5d mark iis af points remain fully visible