The Cokin A123F filter allows you to tint your photo. The filter is strongly blue at one end and gently transitions to a very soft blue at the other end of the filter. The gradient runs through virtually the entire length of the filter. Cokin filters are mounted by means of a holder, which is attached to interchangeable mounting adapters of diameters that can be adjusted to your lens. System A (size S) is recommended for use with compact cameras with lens mounts or amateur video cameras.