Canon t3i/600d vs Nikon d5100. in Photography Gear and Technique Posted April 24, 2012 I don't have much feedback for shooting stills UW, as I am primarily a video guy; however, if you plan on shooting video with your SLR, the t3i has some features that you may find useful, including the option to shoot 60 fps at 720p (while the d5100 has a maximum framerate of 30p at any resolution). If you plan to shoot macro video, the t3i also has a neat feature that crops a portion of your sensor in order to get a 3x to 10x zoom without a loss of image quality; effectively making it possible for your 18-55 kit lens to become a 180-550. That's only useful for macro, but it's a cool feature. Note that my only experience with this camera is topside; I've only used dedicated video camera rigs underwater.