They’re intended to change the traditional filter holder slot design into an efficient quick release filter system, but how effective are H&Y’s magnetic filter frames? 

Every now and then a new product arrives on the market that’s so useful, it makes you wonder why it was never thought of before. This is exactly how I felt when I used Manfrotto’s XUME filter adapters for the first time a year ago, which uses the power of magnetic force to lock filters onto lenses quickly and easily.
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https://www.amateurphotographer.co.uk/reviews/accessories/hy-magnetic-filter-frame-review