Beautiful depth of field with wider apertures. Cinematographers can use the ND8 Filter Plus to create more cinematic effects in low light without losing quality or overexposing the shot. With less light entering your camera, you can also use wider apertures in low light for a beautiful shallow depth of field effect without overexposing images. The Urth Professional ND8 Square Lens Filter Plus provides three f-stops of light reduction, giving you better control with long exposure and depth of field techniques in low light. Urths Plus range features 20 layers of nano-coating, providing a more consistent transmission curve for truer light reduction, easier cleaning, and better protection against water, oil, and scratches.