The C4 4x4” Filter Holder from NiSi is the designed for videographers who need to travel light but don’t want to sacrifice quality. The NiSi C4 Filter Holder allows you to use two 4x4” filters in any combination as well as a circular polarizing filter. With the unique rotation wheel design, the CPL filter can be rotated via a cog on the back of the holder. This means you no longer have to use one of your filter trays for a polarizer. It is made from a single block of aviation-grade aluminum and has a matte black frosted finish to minimize reflection. This C4 comes complete with an ultra slim 86mm CPL filter, 4 adapter rings for most popular pro lenses (67mm, 72mm, 77mm, and 82mm), and a leather carrying case.