Currently I have a Canon 30D with a 17-85mm and a +4 diopter in an Ikelite housing, 6" dome port. I want to upgrade to a 7D (which I already have) and upgrade the lens. I don't want to use a diopter lens, so need to choose something that will focus to less than 12". I'm considering a Canon 17-40mm and a 6" dome.
I have Ikelite DS125 and DS160 strobes, so I should have plenty of light.
Next part, more of a comment, since I will now have the ability to shoot video, I plan on mounting my two L&M SOLA 2000 video lights to my strobes, will look a little funny but will give me both options, I'm giving up using a seperate video camera.
Is anybody else using the 17-40mm lens, and if so, any comments or suggestions? I would like the 16-35mm but I need to cut some costs.