Greg Warehiem is the winner for this week's Sunshots theme, "Mechanical," for his photo of a rolling steam engine. The photo was taken with a Nikon D3000, lens at 22mm, f.22, 1/25 shutter speed at ISO 400. Baltimore Sun photographer Algerina Perna comments, "By using a slow shutter speed, Wareheim caught the wheels' rotations. By panning horizontally, he also created a blurred background as he followed the movement of the engine. The illusion of movement adds another dimension to the photograph."