I have an unknown brand webcam at work, similar to Logitec. I measured my lens before ordering and the actual cap fits perfectly. It also looks like it's part of the original webcam. My only criticism is that the "latch", a tiny plastic tab that fits into a hole on the other side, isn't very strong. It keeps opening up. So far it has mostly stayed closed and still blocked the camera's view, but I don't know if it will stay that way.
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