Formatt ND GRAD SE 0.6 (Neutral density Soft-Edge Graduated) 4x4 glass filter. Neutral density filters (also known as NDs) produce a grey neutral tone and are used to reduce light, enabling more control over exposure and depth of field without affecting colour or contrast.

They are especially useful in bright light conditions to avoid over exposure. When using wider lenses they adjust exposure correctly, allowing for reduced depth of field. This enables highlighting of the principal subject and taking the foreground or background out of focus.

These ND filters are clear in the bottom half of the filter with a gradual transition to the ND effect in the top half, and are used for skylines. They are usually used with wide or prime lenses.