I shot this late in the afternoon on the Roaring Creek trail near Cameron Pass, Colorado. I had my eye on this section of stream on the hike up, but I waited until the trip down for the light to dim. Then I put on my polarizing filter to darken the scene even more- dark means slow shutter speeds, which gave me the effect I was looking for. I shot a series of exposures so that I could use Photomatix later- this let me expose the water properly, while still getting shadow detail in the forest.
Technical Data: Canon Rebel XTi; Canon EF-S 17-85mm f/4-5.6 IS USM at 17mm; f/18 from 0.6 seconds to 5 seconds at 1/3 stop intervals; ISO 100.