NiSi フィルターシステム Fujifilm X100/X100S/X100F/X100T/X100V用 (プロフェッショナルキット)

I was blown away by how seamlessly the filter holder locks onto the lens without any play. Being able to stack a polarizer and ND filter has already saved me in harsh midday light.

Had to fiddle with the adapter ring for a few minutes, but once it clicked on, the magnetic mount is so satisfying—swapping the ND and CPL filters mid-shot takes seconds now, which is huge when I'm chasing light on the street.

Was hesitant about the cost, but the build quality of the adapter ring is incredible—precision-machined and fits my X100F perfectly. The kit makes using square ND filters for long exposures so much easier than threading on a round filter.