PolarPro Peter McKinnon Signature Edition II VND - Gray filter without vignetting. Ideal for shooting in bright conditions with large apertures. Recordings are possible in LOG formats with an ISO setting above 400. The preset stop range prevents the possibility of cross-polarization. No vignetting occurs up to a focal length of 16 mm. The tactile feedback mechanism allows for effortless stop value changes without taking your eyes off the subject. The built-in Defender360 filter protection provides a waterproof and dustproof seal. The proven Signature Edition has been redesigned and now features a unique tactile feedback mechanism. ND filters extend exposure time. A neutral density filter (ND filter) blocks a portion of incoming light, allowing you to significantly extend exposure time and achieve effects like blurred water or prevent overexposure of the image when shooting wide open in bright midday sun.