K&F Concept Nano-D Variable ND Filter with Multiresistant Coating (49mm, 3- to 11-Stop)

This 3- to 11-Stop Nano-D Variable ND Filter with Multiresistant Coating from KF Concept is a 49mm variable neutral density filter that provides an adjustable light reduction of 3 to 11-stops. It darkens the entire image area evenly, allowing a photograph to be made with a slower shutter speed or wider aperture without overexposing the image. Slowing the shutter speed increases the exposure, making it possible to increase image blur to emphasize motion, as when shooting flowing water. Alternately, when increasing the aperture provides finer control over depth of field, useful when trying to isolate the subject. This adjustable filter is especially useful when shooting landscapes and in very bright light conditions, and it is useful for both still and video imaging.