Nigel uses a Canon 50D, a Canon 300L f/4 with a TC 1.4. He doesn’t need any stabilization… In this case no tripod…, just a small piece of foam underneath and on the side of the lens to make sure that the lens doesn’t end-up in the water.

Here are some of his photos on Flickr: https://www.flickr.com/photos/winnu

I have only one word: Amazing!

BTW, Not too long ago, Nigel upgraded to a Canon 5D MkIII with a Canon 500L/f4 and the TC 1.4mkIII.

Photographer laying down almost in the water

How Low Can He Go?

Technical

Before (left) and after (right) as processed with Darktable 2.0.5

Before (left) and After (right)

Camera: Canon 7D ISO 400 and 1/250
Lens: Sigma 120-400 f/4.5-5.6 @120mm and f/8
Processed with Darktable 2.0.5: http://www.darktable.org/