Cokin Z-153 Z filter Neutral Grey ND4
Cokin Z-153 Z Filter Neutral Grey ND4X
Neutral Density filters reduce the amount of light that enters the camera, but have no effect on colour balance. These filters are used to capture situations with a lot of movement, to reduce field of depth or to record situations with a lot of lights.
The Cokin Z 153 has an exposure adjustment of 2 stops and reduces ISO 1/4.