In landscape photography & Black & White mode, the Green Colour filter lightens the nature & especially the greenery scenes (forests, fields...). It improves the depth-of-field & creates some unique grey tones. The Cokin Green filter can be used with a Digital camera or a Film camera using Black & White film. The Digital camera can be used in either colour or Black & White mode. For Black & White mode, set the menu to the ""B&W"" position & then use it like a film camera.