ND2 ND4 ND8
RF70 lens set includes several neutral density filters. These 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.
Using a larger aperture of f/5.6 (35mm equivalent: f/2.4), you can achieve shallow depth-of-field in brightly lit conditions. This is perfect for outdoor shooting and long shutter exposures.
The higher the number, the stronger its light-reduction ability.