Had this idea in my head for a while. Shot with the 24-105 @ 32 mm using a Singh-Ray Varo-Duo which is a polarizer and neutral density filter. Set polarizer to cut reflection and turned ND down to max density. I then set the lens to f 20 and exposed five frames from 10 sec to 30 sec and processed in Photomatix as an HDR image. The movement of the water diffracted light into the depths and multiple exposures allowed the polarizer to cut reflection on the surface as it moved. This technique allows you to see something that is there but not normally seen by the human eye.