Berkley White has just returned from Isla Mujeres, Mexico, where he tested the Nikon D300 and Sea & Sea MDX-D300 underwater housing on sailfish and baitballs.  Talk about a tough subject for a camera / housing test!  I’ll skip to the summary here, but you should click over just to see the fantastic imagery:

In my humble opinion, the Nikon D300 offers the most significant advance in underwater digital photography since the Nikon D100. It’s beyond instant digital feedback and produces images on par and argubably better than results I’ve ever achieved with 35mm film. When considered at ISO 400, the results are clearly better than scanned slide film. The Sea & Sea MDX-D300 housing might not be perfected in highend ergonomics, but it is clearly a professional level housing at a great price...