5 aperture stops.
The K&F Concept variable lens filter should only be rotated between the edge markings MIN and MAX. MIN refers to ND8 and MAX refers to ND128.
The K&F Concept 52 mm ND8-ND128 ND filter is compatible with all camera lenses that require a 52 mm thread diameter. Lens cap and lens hood must be a thread size larger (i.e. 52 mm ND has a 55 mm lens cap)