The 1st Leica M 240 Under Water. Check this out
By Loic Dorez
(If you would like to see Loic do a full review on this, leave a comment below)!
Manual focus is not really an issue. I use it like I used a Nikonos adding to that the techniques to shoot and focus with doom. The Leica M240 is really interesting because of its large dynamic range. Special when you shoot split water. Very dark under and highlight on surface. Plus at the end everything is incredibly compact for a full frame camera + a professional housing with doom. Quality of the camera also around 400 to 800 iso make also differences. So it’s on some way really hard to use but when you find the good tune is perfect.
Here a link with more picture and also a video shoot with the Leica. ===>http://loicdorez.com/leica-underwater/