Hi All. In July I am heading to South Australia to cage dive with the Great Whites, with my Canon 50D in an Ikelite housing. I recently brought a Tokina 10-17 fisheye lens for the trip. I have the Ike 8" dome port, but would need to buy the superwide mounting body #5510.11 to use the lens with the 8" dome. My other option is to buy the 6" dome port #5503 and shoot with the dome shade removed. I have read that, in the cage you are better off with a less bulky rig. I was wondering if one or the other improves or detracts from the images. So the question is, am I better off with the 8" or 6" dome port. Thanks in advance for your replys.