Article Summary:

Stephen Frink has posted a few underwater images taken with the Canon 1D Mark IV, as well as his first impressions:

Holy crap ... AF is so nice. Very fast and accurate, even in low contrast subjects like black wetsuits. Focus acquisition is brilliant. Having shot my 5DII in similar conditions the 2 previous days, the improvement is striking.

Check it out, if you’re thinking of taking your 1D Mark IV underwater.