B08KZRBJHR QKOO Neutral Density Filter ND4/8/16 Lens Filter Set for GoPro Hero 9 Black (Works with Media Mod) (Directly Replace The Standard Protective Lens On Your Camera)

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Reduce an amount of visible light that enters the lens, allowing the user to utilize wider apertures or slower shutter speeds, particularly in bright conditions.
Work especially well for portraits by allowing the photographer to reduce the depth of field, producing pleasant background blur while keeping the subject in sharp focus.
Emphasize movement by permitting slow shutter speeds in bright light, giving life to photos that would otherwise look frozen in time.
This particular filter is multi-coated to minimize reflection on the filter surface, which reduces flare and ghosting, and produces sharp contrast and well-balanced color.