This is the new filter adapter for the G12 which I believe is backwards compatible with the G11 and perhaps other models too. I’m a little surprised that it has received no mention on this forum so far.
I recently took my G11 out to a beach to photograph some statues when the wind was blowing 30+ knots and sand blowing everywhere. Needless to say, the odd grain or two of sand found its way behind the lens covers which was subsequently vacuumed out.
Hopefully, this new filter adapter will provide some much needed protection for the front lens element and allow the use of other filters when needed. My daughters G9 has just failed with its lens in the open position and it makes me wonder if, after some 20,000 miles of travelling, she would have benefited from this type of protection too.