I thought this might be helpful for the new-to-photography folks. I am presenting the same shot @ three different apertures to show how that relates to the DOF. 1. f2.0 2. f4.5 3. f11 You can see that as we use a higher f# we get less separation of the subject from the background. In this case @ f11 the dragonfly blends into the background but@ f2 it is separated from it. Taken with a Helios 58mm f2 manual lens on a Panasonic G1 mounted on a tripod. Pics are not cropped.