The Hoya ND4 HMC filter protects the front glass of the lens from small scratches and minor damage.

Its main use is to darken the image in a controlled manner, allowing for:

• Increased duration for shutter closing.
• Larger aperture opening.

This facilitates control over depth of field and motion capture.

With the Hoya ND4, you gain 2 stops in image exposure without affecting colors.