The lens may be waterproof, my camera is not. But there's always the option of shooting from within my BMW-brand blind, right Dave?
This lens will take some practice. The DOF at F2 isn't razor thin for shots from a few yards away, but you do need to consider it. The bokeh looks to be nice, though. Just getting used to standing waaaaaay back for shots, like the 30ft or so I was away from these flowers, will take some adjusting.