I cannot figure out what is happening. Surely I must be doing something wrong. The problem is that I can't make AF-C work (at all ). This is not a sophisticated problem like the dozens I have read about here already. AF-S works fine, which, for me, is all that I normally need. However, I would like to be able to use the AF-C capability when the situation arises where I need fast focusing on a moving subject. The testing situation is extremely simple: I am just sitting here in my living room moving the camera about the room, aiming it at near and far objects while in AF-C mode, Preset 1 (yes, I made sure the switch on the front of the camera is in the correct position) . I am using zone focus, with both half- and non-shutter press having been tried. The focus does not shift at all as I move around the scene. This is about as benign a test as one could run. (This is not a wild action situation.) I would expect the focus to shift smoothly as I aim it at different parts of the scene. Is that an unfair assumption? Surely I must be doing something wrong. I expect the probability of a camera technical problem to be about zero, so that leaves me. I would appreciate someone telling me what I am doing wrong. Thanks for your help.