Hi guys, I am having this loose sound problem on my camera body and i dunno if i should be worry about it or not? When i gently shake the camera body(without the lens), i can hear a loosen sound coming out from behind the mirror ?? The loosen sound seems like some camera parts behind the mirror is loosen?? Sorry, i dunno how to explain this in more details.... The loosen sound is still there when the lens mounted on the camera body. Despite the loosen sound the image quality still great. I didn't noticed any changes on the image quality.