Cokin P-Series Graduated Neutral Density Grey G2 Filter
The Cokin P-Series Graduated Neutral Density Grey G2 Filter is color-toned in one half of the filter and have a smoothly graduated transition into the clear portion. Basically, this Gradual Neutral Grey reduces the total amount of light reaching the film, but without affecting the colour balance. It restores the balance between the main subject and the foreground/background. 121 is color 2.