NiSi N-577833 67mm Swift FS ND16 4-Stop Filter

The NiSi Swift FS ND16 is a 67mm neutral density filter that reduces light transmission by exactly 4 stops (1.2 density), giving photographers and videographers precise exposure control in bright conditions. What sets it apart from conventional ND filters is its Full Spectrum (FS) technology, which accounts for both ultraviolet and infrared light. Standard ND filters often allow IR contamination that produces unwanted magenta or red color casts, especially at higher densities. The FS ND16 neutralizes this, delivering true-to-life color rendition that requires little to no correction in post-production.

Physically, the filter is part of the NiSi Swift system — a modular press-on ecosystem where filters attach to a base mount via friction rather than screw threads. This means no cross-threading, no stuck filters, and significantly faster swaps in the field. The FS ND16 can be mounted on its own using a Swift Adapter, or stacked on top of a 67mm Swift True Color VND for an extended density range. The glass itself is high-definition optical glass treated with NiSi's Pro Nano Multi-Coating for waterproofing, scratch resistance, and anti-reflective performance. It is worth noting that the filter cannot be used independently of the Swift system — a Swift base is a required separate purchase.