I have been using a nikon 50 film camera with a sea n sea housing for years. I have a flat port and wide angles with several lenses. I also have been using two nikonos sb 105 strobes. I want to go digital and am thinking of the nikon d80 with the new sea n sea housing. My question is .....how much of my old equipment can I keep and use with the new digital system? I hate to start all over from scratch again