Colour filters Cokin colour filters are technical tools and just right if you want to achieve the following results: add warmth to your portraits, correct colour casts, suppress excessive brightness, eliminate the green cast of fluorescent lights, simulate night shots in daylight, control the conversion of colours to greyscale when taking black and white photos, and keep UV radiation away. They are suitable for lenses with a filter thread up to 96 mm and are specially designed for today's digital SLR cameras. Use filters for light and colour control directly in the RAW file when shooting. Maintain the highest image quality by eliminating the need for post-processing and create special effects without time-consuming work on the computer.