Metering modes from Shooting with the Canon Rebel T3i (600D and Kiss X5) Accurate metering is critical to getting good results from your camera. Fortunately, metering technology is so good that your camera should yield correct exposure 80 to 90 percent of the time. To help ensure that your exposures are good, though, your camera offers several metering modes, some of which might be more appropriate for one type of situation than another. To change the metering mode on the Rebel T3i, press the Menu button and go to the second shooting menu. Metering mode is third from the top, and displays your current metering mode. Hit the Set button to display all of the available modes. Evaluative metering divides your scene into a grid, meters each cell of the grid, and then averages all of those results together to come up with a single overall exposure setting. Partial metering meters a circular area that covers about 6.5 percent of the middle of the frame. It’s good for portraits or backlit situations, such as someone sitting in front of a window. Spot metering meters only a very small circle in the middle of the frame. It covers about 2.8 percent of the viewfinder. You’ll use this mode in times you’re facing a high dynamic range situation, when you need to be absolutely certain that you have detail in one particular spot. Center-weighted average metering is like Evaluative metering, but more statistical weight is given to the center of the frame when all of the various meterings are being averaged together. It’s good for backlit situations, but Partial metering probably works better in that scenario. For most of the scenes, Evaluative metering will work fine. In fact, you may find that you never change your metering mode from Evaluative. If you do change your mode, be sure to go back to a metering that’s appropriate for the rest of your shooting after you get your shot. If you’re interested in finding out more about metering, this topic is covered in detail in Foundations of Photography: Exposure. |
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