i did try a few shot.. maining on aperture setting.. by the way wad the diff of A-dept and AV?
Have you found your manual? It's this little white booklet that comes with the camera. If you have misplaced it then you can download the manual from Canon website. Your question is answered there, including examples when and how to use A-Dep. According your scenery I can say that you don't need A-Dep here, but do read and understand what this mode does.