Originally Posted by 94TurboGSR

If you look through your menus you will see that you can change your metering mode. Matrix/evaluative takes a meter reading from the entire scene and adjusts your aperture/shutter speed accordingly. Spot metering meters from your focus point, and it takes the meter reading without using the rest of the scene into consideration. You may also have center weighted metering, which is somewhere in between the two.

LMK if you don't know what I mean, I'm in a hurry to get to work so I don't have time to elaborate now.