Cokin P161 Polacolor Red is a polarizing color red light filter. Cokin Pola-Color filters come in three types: red, blue and yellow. Pola-Color filters allow you to get color polarized images.
If you combine Pola-Color with a P164 neutral polarizer, you can change the color intensity by rotating the neutral polarizer. For example, depending on the relative rotation of the P161 Pola-Color Red filter and the P164 neutral polarizer, the image acquires either a light red shade or a more saturated red shade. When using the P161 filter separately, the entire image is painted in its own shade.
It is installed in a special holder in the place closest to the lens. Fits any lens with a 49mm to 82mm thread. These Cokin color filters can be used together with other Cokin P series filters. Both filters can be rotated 180 degrees, and when using the additional Cokin P308 holder, they can also be rotated relative to each other.