Another example from my photography class pictures. It was very hard to capture the windmill in motion. I couldn't get a slow enough shutter speed even with the aperture stopped down all the way, which by the way also showed me that my sensor is REALLY dirty. ;-) I finally put my ND filter on my lens and was able to capture the motion in the second shot.
Took this shot at my photography class field trip to Cedar Hill State Park. I'm working on various ways to convert to black and white. Got a new Photoshop Elements book and am learning some new techniques.