
I bought these thinking they would be easier to turn on and off than the filters that replace the Hero 9 lens cap and EASY to turn on and off are, and The price is very attractive and the quality of the filters themselves is very good. BUT not being able to put a protective cap on the lens (as another reviewer mentioned) turns out to be a problem. At the moment I am not aware of any third party products that would allow me to do this. Another issue for me is the lack of a reasonably compact storage box. However, this problem can be solved with a third-party filter housing. While the box they came in protects them very well, they take up too much space and are incredibly difficult to open. The added benefit is that they can be used with almost ANY accessory available for the Hero 9. I guess I'll go to EBay to offload Telesin filters.

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