NiSi M75 Starter Kit 75mm System - M75 Starter Kit 75mm System is made especially for mirrorless cameras and compacts and is compatible with 75mm wide square filters (2 mm thick) from NiSi and other brands. The filter holder can be rotated 360 degrees and can also be locked in any desired position. It's made from aviationgrade aluminium and has a new design for locking the filters in place, which makes inserting and removing very smoth. The standard mount fits a 67 mm filterthread but the holder can be used also with adapter rings for filter threads from 40,5 mm to 62 mm. Adapter rings are sold separately (see list below).   This kit comes complete with an ultra slim circular NiSi Polarizing filter (CPL). With a unique design, the polarizing filter can be rotated via a small wheel on the back of the holder. It means you don't have to detach any square filters to be able to adjust the polarizer.   Lens compatibility The NiSi Filter Holder M75 can be used on APS-C lenses with focal