37/40.5/43/46/49/52/55/58/62/67/72/77MM Full Red/Green/Yellow Color Filters For Pentax Olympus Fuji DSLR Camera Lens Accessories Yellow for the black and white photography can be a slight increase in contrast, for example, a clearer line between heaven and earth.To further increase the contrast, you can use orange filter, or a much stronger contrast of the red lens. These color filters can also be used in color film, so that the whole scene into a yellow, orange or red. Green for the black and white photography, portrait photos in the outdoors creates a more delicate, sober sense of style, skin tone and contrast. The skin tones in the photograph leads to a modest description of facial expression. It is mainly used for black and white photography, and also be used in some color film, so that the whole image into the green.Using red, green, and blue filters together, it can change the the colour of the moving objects with threes times of exposure, and still keep the colour tone of the objects. Package List : 1x Full Color Filter 1x Storage Box