Improve your photography with the Starblitz neutral grey filter 1000x 49mm ND filter. The filter's main advantage is that it reduces the amount of light passing through the camera lens, allowing you to work with longer shutter speeds. It also creates motion blur on moving objects. Another neat bonus of ND filters is that you can use a wider aperture for a stunning depth of field effect. The Starblitz neutral grey filter 1000x 49mm ND Filter features a 49 mm filter diameter, making it compatible with all lenses of the same diameter. The ND factor of 1000 indicates a transmittance of 0.1%, so you can set up an exposure a thousand times longer.