The ND400 should be used if you need to substantially reduce the amount of light, such as when taking a photograph of the sun.
It is also used to create different effects from what we actually see
With a slow shutter speed.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.62 inch
Height : 0.16 inch
Length : 4.25 inch

Item Weight: 0 ounce (View shipping rates and policies)
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ASIN : B002EBBBI8