52MM UV Filter Ultra Slim Japan Optics Multi Coated Ultraviolet Protection Lens Filter

SKU: KF01.K52

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hello , the more expensive filter is Nano coating and scratch-resistant. this filter only Multi Coated, it is helping repel water, dust but no scratch-resistant. the 82mm filter for 77mm lens, you need a 77-82 mm filter adapter.like this item 
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new technology i guess, cnc Trapezoidal thread forms are screw thread profiles with trapezoidal outlines which helps more friction when screwing. Very easy to install. 
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hello, The K&F Polarizers Filter Multi Resistance Coating (MRC) helping repel water, dust & grease, while also preventing ghosting 
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The filter thread has a standard pitch of 0.75mm. 
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It will say on your lens in small print the proper size you need