Buy NiSi 82mm (82MAG) Filters - Built for Fast Lenses
82mm is the classic thread of fast professional zooms and wide angle lenses, which happen to be exactly the optics you swap filters on most often in the field. The magnetic version takes the screwing out of it: drop it on, feel it lock, carry on shooting. NiSi covers this diameter with ND filters for long exposures, polarisers for landscape work, variable ND for video and effect filters for softer highlights. Adapter rings and magnetic caps are part of the system, so your filters stay protected in the bag as well. Buy your 82mm magnetic filters now.
