Thanks to this board I have learned so much about this camera and photography in general, but I have one more question. I see a lot fo talk about metering- i.e. spot metering. Could someon please explain what exactly this is (I have the general ideea), some example situations for it, and where I find hat setting on ym camera? Thanks as ALWAYS!
Metering in general refers to the light metering the camera is able to do in all of it's auto exposure modes (all of the Auto, Scene, also the P, Av and Tv modes). The camera uses its light meter to determine what aperture and shutter speed settings (and ISO in the case of the Auto and Scene modes) by trying to determine how bright the subject you are shooting is.
The S3 (and lots of other cameras, too) has 3 different metering modes; evaluative, center weighted, and spot. You access them through the FUNC menu (the FUNC button) and scrolling down the left-hand side;
here's a link to the S3 online manual about the topic.
The more light the camera detects, the faster of a shutter speed it can use and the more likely it is to get a clear/sharp picture. Even excellent IS can't help if the subject moves while the shutter is open. This is why you (usually) want to use the fastest possible shutter speed that the given lighting conditions will allow.
This is where Spot metering comes in. When you are trying to take a picture of something that's well-lit but against a dark background (like performers in FOTLK) the Evaluative metering will look at all of that black and pick a slow shutter speed. Spot metering will look at ONLY what's directly in the focus rectangle, disregarding all of the dark background, and use that to determine the proper shutter speed, which will almost always be faster.
For example, when I was trying to shoot
Nemo: The Musical in Av mode, without Spot metering the shutter speeds were far too slow; generally 1/4 sec. or less, and any pics were mostly blurred by even the slightest movement of the performers.
By switching to Spot metering, I was able to get a passable 1/60th of a second, and
a few reasonably sharp pics.
Using Spot metering in these sorts of lighting situations can get you well exposed subjects and very dark backgrounds ... but, as most of the time the backgrounds aren't very interesting, anyway, it's OK....