I know this sounds daft, but being in the position of considering a move from Nikon F5 to Hasselblad 503cw, one thing occured to me - are hasselblad 503cw rain proof? In other words, if I'm stood on the edge of a cliff waiting for the light in the rain, is my expensive hasselblad 503cw going to get wrecked? Converesly, my F5 just brushes the rain away.