1、ND1000: The number of gears of this filter is very high, suitable for outdoor shooting of flowing water, white clouds, street scenes, etc. 2、Main Function: The function of this filter lens is to filter light, thereby reducing the exposure of the camera and preventing overexposure. 3、Optical Glass and Aluminum Alloy: The camera filter uses premium optical glass and it can rotate 360 degrees between ND2 to ND1000, more variable aperture from 1.5 to 10, reducing the amount of incoming light without affecting color balance. 4、Multi Layer Coatings: Multi layer coatings help with water and dust resistance, while reducing reflections from filters, giving you the opportunity to experiment with different shooting possibilities. 5、Ultra Thin and Lightweight: This ND filter is lightweight and the CNC non slip frame facilitates quick and easy filter installation and removal.