Re: S3 IS help
Kyle,
Your settings for Av mode seems to be missing something, ie. the actual aperture setting. It looks like you meant exposure compensation -1/3EV, not aperture -1/3, if I deciphered it correctly.
Aperture setting would be something like f/2.8 or f/4 or something along those lines (and possibly w/out the "f/" part or possibly replaced w/ "F" like F2.8). Most of these compact digicams have aperture settings between f/2.8 and f/8 at the wideangle end and maybe ~f/5 to f/8 at the telephoto end -- the ones w/ better lenses might go as large (or bright) as f/2 at wideangle and f/2.8 at telephoto.
Anyway, I suggest you take some time to go through a basic photography tutorial/guide to learn some fundamentals, if you really want to get the most out of your camera -- and wanting consistently good results in difficult situations like indoors w/out flash will really need that. There is no quick-and-dirty answer for your request for good settings to use across a variety of difficult indoor situations. You'll be pushing the very limits of the camera's capabilities and then some, so you'll often need to make good decisions/compromises about how, what and when to shoot for good results -- and may also need to use the brute force method of shooting a lot just to get a few decent shots. And unless you learn the basics well, you won't be able to make consistently good decisions/compromises for consistently good results.
For the concert this Saturday, what kind of concert is it? What's the venue (and the expected lighting)? What kind of photos do you expect to shoot? How far will you be for the shots? And the list goes on... More details would help determine how to approach the shots and what kind of settings to go for. Concerts can vary widely in lighting whether in color or in brightness or between spot lighting (and its direction) and ambient lighting, etc. You might even encounter stuff like fog/mist produced by dry ice or the like that can affect your shots at concerts. Your distance will matter of course as zooming (as you know by now) can impact your choice of settings for best results, and also, it affects your camera's POV (or perspective) and thus choice of framing/composition and whatever potential perspective distortions, especially if up close.
Having said all that. In general, I would recommend that you zoom toward telephoto as little as possible for your indoor shots since the lens is dimmer as you zoom towards the tele end -- it is brightest (w/ largest available aperture) at the wide end. You'll need the larger/brighter aperture for faster shutter speeds. Also, if you keep the lens closer to the wide end, you won't need as fast shutter speeds to prevent camera shake blur (though this doesn't prevent motion blur from moving subjects). If you're comfortable w/ using Av mode, you probably want to just keep the aperture setting at its largest at all times for your handheld indoor shots -- and again, that "largest" aperture setting will vary depending on the current focal length (ie. zoom setting) of your lens. In Av mode, you set the aperture and exposure compensation (and ISO), and the camera will choose the shutter speed accordingly based on what it thinks/guesses as best for an even exposure. If you find that the shutter speed is not fast enough even at the largest aperture, you will probably need to bump up the ISO setting until it's fast enough. For still people subjects, 1/60sec might be fast enough (assuming you have IS turned on). For moving subjects, you might easily need 1/250sec or faster. And FYI, ISO and shutter speed are directly proportional, eg. 2x ISO yields 2x shutter speed w/ all else being equal.
_Man_