The 72mm Variable Neutral Density Filter from Bower gives you the capability of shooting with high speed film or high ISO settings on your digital camera, even in direct sunlight. ND filters reduce the amount of light that reaches your film or your sensor, and this variable ND filter allows you to choose just how much light you want to block from 2 to 8 stops. To adjust the amount of light, simply turn the adjustable dial for a seamless adjustment.
With the variable ND filter on your lens, you can control both the exposure time and depth of field in your photos. Without an ND filter, most cameras do not have a shutter speed fast enough to allow you to shoot wide open in bright conditions. By adding an ND filter, you can blur your background and isolate your subject, even under direct sunlight. You can also shoot very long exposures which is useful for landscape and architecture photography. Exposing your shot for a long period can make people, clouds, cars, and other moving objects seemingly disappear from your images.