67mm Variable ND Filter, Fader ND2 to ND400 Adjustable HD Neutral Density Grey Filter with Cleaning Cloth for Camera Lenses
SKU: SKU0127
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K&F Concept ND2-ND400 lens filter controls the amount of the light that enters into camera lens with two sets of polarizing glass of high transparency.
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No don't use this for that purpose. Use a properly designated "Solar filter"
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Yes it does. The optical density of this filter is very low. I no longer use it.