For Insta360 GO3S STARTRC 4 in 1 ND8 ND16 ND32 ND64 Camera Lens Filter
ND8 ND16 ND32 ND64 filters provide 3/4/5/6 levels of light reduction respectively. When used, the shutter speed can be reduced (the shutter speed when using ND ND8 ND16 ND32 ND64 lens = the shutter speed when not using ND lens x 8/16/32/64).