high grade multi-coated multi-threaded neutral density filter - 67mm alternative for sony alpha part vf67ndam
neutral density filters nd8 have four main uses 1 . to enable slow shutter speeds to be used especially with high speed films to record movement in subjects such as waterfalls clouds or cars . 2 . to decrease depth of field by allowing wider apertures to be used which helps separate subjects from their background . 3 . to decrease the effective iso of high speed film above iso 400 and allow it to be used outdoors in bright situation . 4 . to allow cine and video cameras which have fixed shutter speeds to film subjects such as snow sand or other bright scenes which could cause overexposure