K&F Concept Nano-X Magnetic Variable ND Filter 67mm

A 67 mm variable ND filter from K&F Concept's Nano-X magnetic range. A thin adapter ring screws into the lens thread and the filter snaps onto it magnetically, so it goes on and comes off in seconds without unscrewing anything. Both sides of the glass carry K&F's multi-layer nano coating, and a self-locking frame is designed to prevent the dark X-cross pattern at the dense end of the range. A variable ND lets you hold a 180-degree shutter and a wide aperture outdoors, which matters on bodies without internal ND such as the FX3, A7S III and A7R V. The 67 mm size fits Tamron's 17-28mm, 28-75mm and 70-300mm zooms directly; lenses with smaller threads need a step-up ring.