focusing object pictures

It depends on you as the photographer and what part of your scene you want to be in focus in your photograph. Most people chose to focus on the closest subject. However, if you feel something in the background is more important, than you can chose to focus on that. Photographers can use images to tell a story. Before you take a picture, think, "What is the story I want to tell?" Then find your subject to focus on based on what you want your image to portray and what story you want to tell.

I'm not sure what you are asking. Have you taken pictures where the focus was not correct? Or was on the wrong part of the picture? Do you understand the focussing systems your camera uses, and were you using manual or automatic focussing? I have written a couple of articles on focussing which might help. Have a look and if there is still some unanswered question, post again. www.qassia.com/photography-focussing-on-autofocus www.qassia.com/using-manual-focus-in-photography

It depends what you're shooting. Basically if you are taking pictures of people, animals, etc, you want their eyes in sharp focus. If you're taking pictures of landscapes you might want everything in focus. Focus is strongly related to aperture and focal length. A small aperture(high f-stop) means focus is sharp front to back. A large aperture means focus will drop off. A large aperture (say f3.5) might allow you to isolate an object from its surroundings. I don't know what kind of camera you have but if you can the best thing to do is take it out of the scene modes and try shooting manually or at least allow yourself to select aperture. You'll gain a pretty quick understanding this way.