Question regarding DOF

[Bolthead]

First; read the tutorials about DOF, especially that of your particular lens. Plan your shot accordingly.

Secondly, does your camera have a focus lock? If so, focus on your subject's eyes, lock it, and move the camera down to include his feet in the frame, without moving forward or back.

The wider the aperture, the more narrow is the depth of field, so at wide apertures, you may only get his face in focus. A more narrow opening increases the DOF, but you will probably still will have his feet out of focus.

Owning this model myself, I can tell you it certainly does have focus lock, w/the press of a button, and it works great, terrific feature. I can also tell you there are plenty of app for DSLR's, some good, some not so good. I have at least 3 or 4 of them on my android.