The cokin z pro 123l graduated blue b2 light resin filter is color toned in most of the filter and has a slightly graduated transition into the smaller clear portion colored and clear image portions can be brought into the desired position by adjusting the filter in the holder most cokin graduated filters are available in two densities 1 2 with 2 being darker cokin color graduated filters can also be combined with other cokin filters two color graduated filters rotated 180 to each oth