A mattebox really makes it easy to transition between different lenses when your camera is sitting on the rig. Assuming that each lens has a different lens cap diameter - you would have to have ND filters or other filters to fit each lens. But if you use a mattebox you can just simply pull out the mattebox filter holder and pop in this 4" x 4" filter for all size lens. It would save time for you and will be much convenient for your shooting.

Feature:
● Ideal for reducing bright light in large aperture situations when a narrow depth is field is needed.
● Allows for slower shutter speeds when blurring or showing of movement is desired.
● Allows balancing of exposure to highlight a key subject.
● Lets you use higher speed films in bright light.

Size:
4" x 4" (10cm x 10cm)

Suitable for:
Standard mattebox

Package includes:
1pcs of 4"x4" Full ND2 filter for mattebox
1pcs of 4"x4" Full ND4 filter for mattebox
1pcs of 4"x4" Full ND8 filter for mattebox
1pcs of 3 slots filter case