The Lee Seven 5 Urban Set contains the following 75x 90mm Lee Seven 5 filters: 1x 0.6 (2-stop) ND Soft Grad, 1x 0.9 (3-stop) ND Soft Grad & 1x Lee Big Stopper (10-stop) ND. The Lee Neutral Density Graduated filters with soft graduation allow you to balance light intensity in one part of a scene without affecting colour balance. For example, when photographing a landscape in which the sky is much brighter than the foreground, placing the neutral density part of the filter onto the sky in the frame will reduce the sky exposure without affecting the foreground. This enables cloud detail to be kept correctly exposed & avoids the white out effect caused by exposing for the foreground. The Seven 5 Big Stopper reduces the amount of light reaching the sensor by 10 f/stops, which allows the use of slower shutter speeds. By increasing the length of exposure time you can create a ghostly, time-passing effect of anything that moves, for example the sea, clouds, waterfalls & people etc. The Lee Seven 5 Urban Set require