Step Two: With your camera solidly mounted on a tripod, take multiple pictures, focusing progressively from the far away to the close by. I suggest that, after turning your auto focus off, you focus on the nearest subject, noticing the distance indicated on the lens barrel. Then focus on the farthest point and work backward. Take one picture; then refocus closer. Take another picture; then refocus closer, and so on. Don't base your refocusing on the lens's distance scale; instead, turn the focus ring in equal increments (degrees) between the distant end and the closest point. Also, keep the manual exposure the same for all images, and, as you turn the lens progressively back toward the closest part of the subject that you want to be sharp, try to keep your camera and tripod still. (If I'm outside, I often push down on the tripod, sinking the legs into the ground.) You may take as few as three or four pictures, or you may need many more. The software will process any number of shots.