You need to ask yourself how much you want to invest in underwater photography. You can start off simple with some point & shoot digital cameras from Sea Life that will probably accomplish the basics, and Sea Life also produces macro lenses to attach to the camera housing. However, as a topside photographer, if you are looking at getting serious macro photography, or want some wide-angle UW shots, a digital SLR would be the (somewhat costly ) way to go. Note that I suggest digital cameras for your underwater photography, as traditional 35mm film cameras will limit the number of exposures to 36, and you will not have an image preview pane, and therefore, not know whether the subject was framed and focused correctly. Also, if you plan on shooting more than one roll of film with a 35mm film camera, you could end up "bounce" diving and subject yourself unnecessarily to a case of DCS. I personally own two 35mm film SLR cameras, and a UW housing for one will cost about twice the price of the camera itself. As stated earlier, if you have a digital UW camera, then you may need a dive computer to monitor your bottom time, depth, and other information as your limiting factor may switch from the number of exposures to your maximum bottom time. Overall, I agree with H2Andy in that a computer would be a wiser investment before a UW camera.