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K&F Adjustable Neutral Density Filter 55mm ND2–ND400, Variable Grey (SB7149)
Summary description:
Adjustable neutral density (variable ND) filter for 55mm lenses by K&F, model SB7149. Provides continuous light reduction from approximately ND2 to ND400 to control exposure and enable longer shutter speeds or wider apertures in bright conditions. Suited for landscape, long-exposure, and motion-blur photography; screws onto 55mm filter threads and offers practical exposure control without changing aperture or ISO.