The Cokin Red filter can be used with a Digital Camera or a Film camera using Black & White film. The Red Colour filter is used for extreme contrasts. By severely contrasting blue sky to almost black, it gives your pictures a dramatic character, & the clouds becomes more brilliant. A 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.