RF70 Lens Set includes ND2, ND4 and ND8. These neutral density filters allow you to get more accurately exposed shots in different lighting scenarios. By reducing extra light entering the camera, these ND filters help avoid over-exposing film in bright sunlight.
The higher the number, the stronger its light-reduction ability.
Using a larger aperture of f/5.6, you can achieve shallow depth-of-field in brightly lit conditions. This is perfect for outdoor shooting and long shutter exposures.
Note: you can fold the camera with a filter installed!