B+w Nd 1.8 Mrc Nano Master 72 Mm Polarizing Filter

B+W Filters BW1101581 B+W Master ND 1.8 Filter MRC Nano 72mm Reducing the amount of light entering the camera Suitable for both analog and digital cameras Wipe effects, continuous light trails Selective sharpness by achieving larger apertures Made in Germany This B+W ND filter , which reduces light entering the camera by six f-stops, already qualifies as an extreme filter. With this filter, and without changing the aperture (and DOF), an exposure time of 1/60 s becomes a full second. Running water is rendered hazy and soft. A tripod is necessary in any case.