Hi, I am going on a trip to Maldives in december 09 and wanted to use my canon 40d for underwater photography. I have NEVER done any UW photography before and want to try taking pictures while snorkeling. I own a Canon EF-S 17-55mm f/2.8 lens. Can anyone please suggest a housing that has a lens port available for the above lens? I googled and found ikelite housing but didn't find any lens port for the above lens. Also, do I need to buy any lighting or other equipment for UW photography if I just want to take pictures while snorkeling during daytime? Thanks for your help in advance.