I’m posting this late, but I did take the picture last week, so it totally counts!
{.tt-flickr.tt-flickr-Medium}
This photo was taken on the beach in Ft. Lauderdale. Surprise, surprise, I used the Sigma 10-20mm f/4-5.6 for this shot. I brought it into Photoshop and created two duplicate layers (for a total of three). I desaturated the middle layer, and then set the top layer to “hard light”. The top layer was set to 100% opacity, but the middle (desaturated) layer was 50%. I then merged the layers and applied noise (6% Gaussian).