82mm Circular Polarizer Lens Filter with Filter Cap Optical Glass Ultra Slim Polarizing CPL Filter with 24 Multi-Layer Coatings for Camera Lenses Nano-Dazzle Series

SKU: KF01.1793V2

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1 stop of light reduction. 
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The polarization effect of the polarizing filter is different for different angles. If the lens is wide and the shooting range is too large, the polarization at certain angles will be stronger, which will be darker. 
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Yes, high-definition image quality is guaranteed at a telephoto of 550mm. 
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It can effectively reduce the reflection on the filter surface and reduce ghosting and other problems.