I took my Nikon 70-300mm lens underwater today. By an accident. I am not sure if anyone ever tried that!
I was in a such hurry this afternoon to make it to the boat dive in time, I took 70-300mm out of my Pelican case instead of 105mm macro. Funny! Of course I did not have time even for a test shot. I made it to the boat in time but got busy again on the boat and never looked at my rig.
Underwater nothing worked. I thought I was having a macro lens of course. I've changed numerous settings underwater and wasted 15 minutes of the dive until I gave up.
And the DA-90 Nauticam housing stopped responding as well. The lens was slightly pushing the macro dome port and finally the camera got misaligned inside the housing. Nothing happened. I even managed to get one picture out of this setup. I am going to keep that picture just as a reminder.
I think I have about 80 dives with D90 and never before failed to assemble it properly. I always assemble my rig the night before the dive. Always worked as a charm. Never ever a I am going to assemble my rig in a hurry again!