The PGYTECH ND Filter Set includes four neutral density filters that reduce the amount of light hitting the camera sensor by varying f-stop increments. This allows the videographer more flexibility with exposure times to create special effects with the movement of light and water without the risk of overexposing the footage. Each filter is constructed with multicoated optical glass that provides water, oil, and scratch resistance while increasing color saturation. An aluminum alloy frame ensures light but durable construction. The magnetic quick setup enables the user to quickly change out the filter to suit shooting in the field depending on the sunlight.