K&F Concept Nano-Klear magnetic phone clip with variable ND filter ND2–ND32 67 mm

Nano-Klear — variable ND filter 67 mm, changes the amount of light steplessly as you turn it. It is popular above all for filming with a phone on bright days, when it takes away surplus light, calms the jitter of a fast shutter and makes motion in the shot look smoother.

• Attaches magnetically to the phone clip in a second

A filter on your phone in a second

The clip goes on over the phone camera and the filter snaps onto it magnetically in a second. Rubber padding on both sides keeps the phone free of scratches, a locking knob tightens the clip and the cold shoe on top carries a small light or microphone. The clip fits all iPhone models.

A variable ND replaces a whole set of fixed grey filters — turning the front ring changes how much light gets through, steplessly. While filming the shutter stays at 1/50 s even as the sun goes behind a cloud and comes back, with no need to stop the take or swap a filter. The filter darkens the image smoothly by one to five stops (ND2 to ND32). The clip also takes other K&F Concept 67 mm magnetic filters — polariser, UV or Black Mist — and with a magnetic ring the filter from this kit also fits a camera lens with a 67 mm thread.