Canon EOS Rebel G camera?

To turn on auto focus look on the lens. There is a switch that will say AF and MF. Switch it to AF.

The full auto mode wont do much for the shallow depth of field you want. Use the aperture priority mode.

Turn the dial to AV. Then turn the wheel to your largest aperture (smallest F #). The camera will figure out the shutter speed. Try using a film like ISO 200 or ISO 400. Either of these films should be fine for most situations.

The Rebel G is a 35mm film camera, the T3 is digital. I'd take a Fujifilm S4250 over either of the choices you mentioned, it's a better digital camera than any of Nikon's L - series will ever be and I have all the film cameras I could want.

Había comprado varias veces cámaras falsas de vigilancias en los sitios web, aunque son de buena calidad al final me he decidido comprar también una de verdad, la seguridad es muy importante y una cámara de seguridad seguramente es una buena compra, he comprado una camera con grabación y he estado muy sorprendida de la calidad del producto a un precio tan bueno, la camera ya instalada, bastante fácil la verdad, tiene una excelente imagen y sonido, verdaderamente ha merecido la pena comprarla.

Well, the auto modes are nice when you are learning so that you don't have to worry about missing a photo opportunity. But you should really try to learn about the manual settings and use them when getting the shot isn't crucial.

This might seem like an impertinent question, but have you looked in the manual? Do you have the original manual? If not, you can find one online maybe a pdf file from Canon's website or you can usually find original manuals on ebay. I would definitely suggest that you get one because you never know when you will need it. It is also good to have if you ever decide to sell the camera.

You can start to work on manual shooting by shooting in aperture or shutter priority modes.

When shooting in shutter priority, you set the shutter speed you want, fast to freeze motion or slow to blur motion, and the camera sets the appropriate aperture based on your shutter speed and the ISO of the film you are using.

When shooting in aperture priority, you set the desired aperture (a small number is a large aperture and causes more blur in the background and foreground and a large number is a small aperture and allows for more of the scene to be in sharp focus) and the camera sets the correct shutter speed for the aperture you have chosen and the ISO of your film.

These modes aren't always as accurate as shooting in manual mode (when you know how to balance the settings), but they are much more accurate and give much better results than the auto modes.

You will want to use autofocus for faster moving subjects and hope for the best as it is hard to manual focus on most moving subjects. My Canon Rebel K2 was terribly slow at autofocusing with the kit lens. But for shots where you can take your time, manual focus is great and allows you to get precise focus without it changing just before you snap the picture.

A book on photography will really help you to understand the workings of the shutter speed, the aperture and the film speed. Good luck!