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 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. 1 x Camera ND Filter1 x Filter Box Item Type: Camera ND FilterMaterial: Optical glass and aluminum alloy