I have the A80 with the corresponding Canon housing (no strobe). I am fairly competent on land with this camera but have yet to use it diving. Will be taking trip to Salt Cay in the Turks and Caicos next February. This prime time for humpback whales and other large creatures. Will this camera setup be capable of taking pictures of these large animals if i am lucky enough to be in the water with them? Wahat settings do you recommend? should I purchase other type of equipment for this setup? The only camera I have used diving is the Sealife reefmaster with the strobe. Oddly enough I did get some very good photos. Thank you for your help?