The Attachable CPL Filter with M-Mount Adapter from SmallRig helps eliminate reflections from water, glass, still objects, and more. This also helps improve image clarity, detail, and color saturation. The overall effect can be adjusted by rotating the filter. A CPL (Circular Polarizer) filter reduces the amount of available light by 1-2 stops and requires either the aperture or shutter to be opened as compensation, which makes it effective as a neutral density (ND) filter.
SmallRig built this filter using multi-coated optical glass and aluminum alloy. It magnetically attaches to SmallRig mobile video cages that support 67mm adapter rings. Thanks to the included M-mount adapter, you'll be able to use this filter with the M-mount backplane on iPhone series cages. Also included is a threaded adapter ring for use on camera lenses with a 67mm filter thread, plus a cleaning cloth and a carrying box.