1. Fader ND filter is able to adjust natural density freely from ND2 to ND400 and carry ONLY a single filter with the same capacity with ND2, ND4, ND8 and ND400, Rotating it in order to change 2-8 stops. It offers you the freedom the create different neutral density freely.
2. The filter in indexed so you know how many stops of neutral density you are getting. It screws on like any other filter and with a mere twist of your wrist, you dial in your filtration. No need to constantly change filters-as the light changes, just dial in another grade of filtration.
3. Apply show shutter speed under strong sunlight exposure.
4. Large aperture is available to create depth of filed easily.