I wonder if there´s anyone using a Canon 5D and Sigma 15mm FE together with a Aquatica 6" dome? Is that combo ok for CFWA? I already have the 8" dome but I´d like to get closer and get better lighting. The 8" dome gives shadows in the middle of the picture. I have search the forum and web, but most discussions are focused on crop cameras and mini domes. I have looked at the port table from Aquatica and it says that 6" dome works with Sigma 15mm, but it would be nice to see some pictures taken with this combo.