This Matte Focusing Screen from Mamiya is designed specifically for Mamiya 645 medium format cameras. It is the standard focusing screen that comes with Mamiya AF camera bodies. It is not masked-off for digital sensors and therefore can only be used with either film backs or the Mamiya 80MP digital back which is a full frame 645. The screen has a matte focusing circle for accurate focusing and comes with a tweezer tool to place the screen into its cradle within the camera.