Fell apart after 1 year

Filter was great for most part but scratched very easily. Cleaned the filter with provided microfiber but left a swirl mark all over the filter. Doesn't effect the image quality but still distracting to look at for me. Update February 2019 Used the lens 3rd time within 1 year period. During cleaning of the filter the actual glass came off the thread and looks like the coating is coming off on part of the glass. See pics.

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