Sure. I use the rear * or AF On button depending on which camera body I'm using to focus. What this means is, I focus on my subject X feet away by pressing the button on the rear of the camera. When I recompose and press the shutter, focus is not affected and does not change unless I pressed the focus button on the rear of the camera.





This makes it easy, and I always shoot with the focus and AE lock/shutter separate from the focus.