I used a Nikon D7000 with Sigma 17-50mm f/2.8 lens at 17mm, 1/8 sec, f/16, ISO 100. Photoshop Elements was used for basic levels and contrast adjustment.
I took this photo in Autumn at Governor Dodge State Park. I placed the leaf on the rock to catch the eye with a pop of color and contrast nicely with the flowing water. I chose a square crop to balance the composition.