The SmallRig 3845C Universal Magnetic Filter Adapter Ring provides a professional and secure solution to shooting using filters. It maintains access to lenses and does not affect the way all functions work. Fastening via a clamping knob, which is solid and reliable, the clip fully protects your phone with two-sided anti-scratch cushions. Its filter ring magnetically secures a 52mm magnetic filter for easy installation and removal. Opening distance reaches up to 13 mm; hence, there is no need to remove the phone case.