Thanks for the comments on the image. I have a number of nice images from this one zodiac excursion. One more time, I am not afraid of high ISOs with the D800 or for that matter my Olympus OM E-1, Fuji XT-1 or many of the newer cameras. I set the ISO at 400 because we were starting our zodiac cruise in heavy overcast. At 400 f8-11 I was getting nominal speeds of 500th of a sec.. That speed especially with a D800 and its high res can still not yield the best image. High mega-pixel sensors are very unforgiving when it comes to small errors in focus or movement. I'd rather go for sure thing as far as stopping motion blur and deal with any noise or grain later when processing. In the case of these kind of shots it really makes no difference. The Nikon and many other cameras yield very nice files at 400 and even higher iso. The brackets were essential for getting an image with optimal exposure in this environment. We were lucky as the god of light saw what we were doing and lit the icebergs and kept the darker clouds in the distance. You really need to see how nice the prints look form these icebergs shots.
Jeff, Yes I like the sound of the motor drive firing off 5 shot bursts. Heck, I'd buy the Nikon D4s cause it sounds so cool at its high speed. (wouldn't anyone) Nothing like have frames per second envy. I was sure you'd give me crap for posting another iceberg shot.
Hans, You know me and I don't follow rules, I try to get the shot. I trust AP exposure a lot. It allows me to shoot at the optimal f-stop and the shutter speed falls into place. When we have shot together we used tripods and could afford a longer exposure at low ISO. When shooting in Antarctica tripods aren't an option.
Kevin