A variable ND filter that makes it easy to control shutter speed and exposure when shooting videos or taking long exposures on the iPhone 17 Pro. Since the amount of light reduction can be continuously adjusted from ND2 to 32, it was easy to match the target atmosphere while suppressing white skipping even outdoors in fine weather, and it was convenient that there was little trouble changing filters for each scene. The magnetic type makes it quick to put on and take off, and the setup before and after shooting is short, so it can be operated at a good tempo even when shooting with a smartphone. Both sides are magnetic and have a strong magnetic design, so there is a sense of stability when attached, and the impression is that it does not shift easily during shooting. Since it comes with a portable storage case, it is easy to protect the lens surface when carrying, and I can safely put it in my bag even when shooting outdoors. I think it's an item that goes well with applications such as “I want to show smooth movement” or “I want to create expression by lowering the amount of light” with long exposures and videos, and it's an item that further expands the range of shooting expressions even on smartphones.