For Digital camera, or Film camera with B&W films. With a Digital camera, can be used in either color mode, or B&W mode. For Black&White mode, set the menu on “B&W” position and use it like a Film camera.Orange filter increases the contrasts between reds and yellows. It darkens the skies, accentuates clouds and strongly subdues ambient light. For architecture photography, it helps to bring out the texture of the monuments’ stones.