For what its worth the 70-200 is a star lens that is wholly Ricoh designed and manufactured. I'm really sorry this happened. I would be complaining a lot if a $1800 lens fell off the camera. The ring on the camera is threaded into plastic. At least on the aps-c bodies. Plastic threads are easier to repair to be honest and bayonet rings can be replaced, so its likely by design. It seems to hold my 60-250 vertically OK. Why they would use plastic for the internal construction of a pro grade lens at the mount is beyond me frankly. I have a bigma and I try to never put the weight of it on the mount if I can help it, which makes changing AF options on the k-3 annoying. My 60-250 has been very sturdy. The hood is getting a little scuffed up, but its only plastic. Such is life. For what its worth, you can take the 60-250 apart from the rear and there is a baffle for APS-C. You can hack the baffle off and put what's left back in as a spacer and the lens is fully full frame. It was designed as a FF lens from the start if you look at the patent for it. I love the 60-250.
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