Adapter S5 The S5 adapters are also available individually for the various lenses. The NiSi S5 150mm filter holder with circular polarizing filter is ideal for landscape photographers who want to combine an ultra-wide angle lens with a filter system. The S5 allows the use of an integrated CPL and 2 150mm insert filters without vignetting. The integrated CPL can be rotated with two gears on the back of the holder when using 150mm filters, a design feature from the popular V5 Pro system. The holder allows for very quick installation and removal without removing the lens from the camera.