Cokin 3 Piece Full Neutral Density Filter Kit for Z-Pro Series Holder, Large

Neutral Density (ND)
Designed so that absolutely no color from the entire visible spectrum prevails, the neutral density filters can be used in many different contexts, depending on which type is used : uniform shading (square) or graduated shading (rectangular). Uniform ND filters reduce the quantity of light that reaches the sensor - or the film - increasing the exposure time. These filters have 3 main practical applications: emphasizing the flow of movement, reducing the depth of field, avoiding overexposure.

Full ND
For long exposure photography. This kit gives you all the control over exposure and shutter speed for stunning effects.