K&F Concept ND64/PL Filter (ND and Polariser 2-in-1) for DJI Mini 4 Pro

ND64/PL Filter (ND and Polariser 2-in-1) for DJI Mini 4 Pro. On a drone the filter goes on before take-off to suit the light; the fixed density then allows a longer shutter, so the landscape glides smoothly beneath the drone instead of stuttering.

• Cuts six stops and polarises at the same time — one glass instead of two

Darkening and polarisation in one glass

Two things in one piece of glass: the ND64 cuts six stops so the shutter can sit at twice the frame rate, and the polarising layer also takes the glare off water and wet tarmac. From the air, reflection off the water surface is exactly what spoils the shot most often.

A neutral density filter takes light away without touching the colours. In daylight it lets you shoot wide open with a blurred background, film at 1/50 s by the cine rule, or lengthen the exposure until water melts into mist and people vanish from the frame.