The NiSi Swift system is the cutting edge of circular video filter technology. It builds on the the success of NiSi's 1-5 True Colour VND, widely regarded as the best VND in the world. The Swift system uses the 1-5 True Colour Variable ND as foundation, which screws into the lens thread like any conventional filter. A variety of other popular filters can then be connected via a low-friction system that just pops onto the main filter.
