I'm a little unsure of how to use the various metering modes, or more to the point, WHEN to use which of the metering modes - Evaluative, partial, spot, centre weighted average. I can kind of guess that spot is that the camera takes the light metering from that spot, and I'm guessing the center weighted average must give extra weight to an average of the metering around about the centre, but that's really only based on word meaning. I'd kind of like to know a bit more about how it all works so as to know which to use and when.