5DMKII+16-35mm, 1/80 @ f/8.0, ISO 125.
Wow! Mother nature granted me with one spectacular view today! A nice follow up to the lunar eclipse :P
I've never seen a rainbow end to end like this. Such an amazing sight with the sun behind me and the shadows of the buildings reflecting in the water.
More step-by-step info on how I took this photo on my blog.