I bought this on Amazon two years ago, but it didn't suit me, so I've kept it stored away unused. I prefer 1/8, but 1/4 is recommended for people like this: Regarding the difference between 1/4 and 1/8: The NiSi Black Mist is a filter that softens light and creates a cinematic atmosphere. The numbers indicate the strength of the effect, with 1/4 having a stronger effect than 1/8. 1/8 → Weak effect (subtle) 1/4 → Medium effect (clearly soft) Reasons why 1/4 is recommended: * Easy to see the blurring of light and the softness of highlights * Concentration that makes it easy for first-time users to feel the difference * Versatile type that is easy to use for both photos and videos * Easy to create atmosphere in portraits, night scenes, and backlight It's suitable for those who "want natural but atmospheric depictions" or "want to shoot in a cinematic style."