I have a Canon 20D in a Aquatica housing, and I am toying between the New Canon 24-105 F4L and the Canon 24--70 F2.8 L. Does anyone know if the Canon 24-105 F4L can work in the Aquatica 8” Dome port? Is there a zoom ring for it? I know that I would be giving up some wide shots, yet the versatility of such a lens UW would be mind-bending. I know that the 24-70 F2.8 L is very sharp and would work, but I would love to have the extra focal length to capture those timid fishys.

Tovia

I've used the 24~70/2.8 underwater and found it to be an excellent 'diver' lens but its close-focus is not particularly good. Just about to start using the 24~105 but probably at 24 in order to be able to try out IS on a FF body (with Alex's magic filters). I'll post my comments in about a month's time. The 24~105 lengthens significantly during zooming and I think that this may limit its viability underwater even with a large dome - until I get a zoom gear made (Seacam are looking into this currently) I can't tell!