This filter blocks a fixed 10 f-stops of light entering your camera, allowing you to use slower shutter speeds for long exposure and motion blur effects in harsh light. With less light entering your camera, you can also use wider apertures in harsh light for a beautiful shallow depth of field effect without overexposing images. Our 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.