An extremely useful filter kit comprising the three most popular gradual neutral density gnd filters gnd2 gnd4 and gnd8 gradual nd2 filter p121l with 1 stop density and hard edged transition gradual nd4 filter p121m with 2 stop density and hard edged transition gradual nd8 filter p121s with 3 stop density and soft edged transition p series filters 84x84mm filters fit p series filter holder m size