Helpful! Variable ND for iPhone 17 Pro This kind of ND is a “physical filter,” so there is no need to install a special application. The dimming effect is normal even with standard cameras. However, video management is probably where the real value comes out. Since the Blackmagic Camera app can shoot by manually fixing the shutter angle, ISO, etc., it is compatible with variable ND. The recommended flow is simple. ① Determine the frame rate ② Fix the shutter angle around 180 degrees ③ Fix the ISO low ④ Turn the variable ND to darken the part that is still too bright in the ND2 to ND32 range. Raise the shutter and don't be fooled. The movement becomes natural, and there is a feeling that “images that look like that” can be created even during the day. (Incidentally, the 2 photos showing the orange bag of lens cleaner in the reference photo were taken with ND2 and ND32 in the same environment. The difference in brightness (darkness) is obvious.) Magnetic attachment is smooth. Click to inhale and turn to adjust concentration. It feels good here. However, since it is magnetic, anxiety about misalignment or falling remains depending on conditions. It is assumed that insurance is covered by the attached strap. It's safe to hold down the filter lightly with your hands while shooting. Another thing to note is the angle of view. When switching to 0.5x or telephoto, there may be vignetting or misalignment. The trick is to carefully adjust the mounting position. Also, it is convenient that it comes with a compact case. You won't get lost even if you throw it in your bag. Speaking of greed, it was even safer to have an attachment that quickly covers the lens surface during storage. Nonetheless, it also comes with a lens cleaner cloth, which is kind. You can create a flow where fingerprints and dust are wiped and taken immediately. Although it has a small weakness, it is a tool that takes daytime video expression one step further. It's an item that changes “how to create exposure” for smartphone photography.