Schertz - 52mm Variable ND2–ND400 Filter – Ultra-Slim, Multi-Coated Adjustable Neutral Density Filter, Clip-On Lens Kit Compatible

(Note: The black "X" crossing appearing in photos is an optical phenomenon that occurs when using excessively dense ND filter under specific lighting conditions. When shooting, try to avoid rotating the filter to the most dense position to reduce the occurrence of cross-light effects.)