Designed for photographers wanting to explore long exposure photography the cokin z pro full nd kit consists of 1x nd2 z152 filter 1 f stop 1x nd4 z153 filter 2 f stops and 1x nd8 z154 filter 3 f stops designed to reduce the amount of light reaching the sensor these filters can be used alongside a long shutter speed to allow the user to experiment with distance and depth of field