caveat emptor kids, i have to tell you in my wretched experience rainproof simply signifies proof of rain that you must pay cheaply or dearly for. don't go out without your rubbers and keep your wick dry. and keep your memory card in your camera. that is why mine had those ghosts from 2013, i forgot my memory card, and now the pictures i took in the wild rain today are ghosts in my camera i cannot retrieve, in the backup memory.
so don't go out without your head, and do not imagine this world is not a ghost manufactory.