>>3899419At f/4, on this lens? Probably even less than that. As you focus closer, depth of field gets smaller. Also, it's important to remember that for depth of field, about 2/3 of your focus will be behind the subject and 1/3 in front. Notice how the DOF scale on the lens is logarithmic. it's a big gap between 5 feet and 10 feet, but 15 and 30 are practically touching.
