Canon T3i User Manual download pdf (Page 10)

Canon T3i Experience

some situations the exposure that the camera determines may not be the exposure you

desire. This may happen when photographing scenes with very bright and/ or dark

areas, or some other type of dramatic lighting. Since dramatic and interesting lighting

can make for compelling images, you will need to know how to deal with this. In these

situations you can make use of either Exposure Compensation, Exposure Lock (AE

Lock), or one of the other Metering Modes below. Of more likely, a combination of

these three solutions.

3.6b Partial Metering

This mode meters a small central area, about 9% of the viewfinder area of the T3i. The

area is approximately a circle that is larger than the spot metering circle you see in the

viewfinder, and reaches to about the inside edges of the nearest focus points (see

Figure 14).

Figure 14 - Harbor, Gloucester, Mass. - Partial and Spot Metering Areas of the T3i -

Partial Metering Mode evaluates only the area under the superimposed grey circle to

determine the exposure settings. Spot Metering Mode evaluates only the area inside

the black circle seen in the viewfinder to determine the exposure setting. Shutter speed

1/400, aperture f/4.0, ISO 100

This mode is useful where there is a dramatic difference in lighting between the

foreground or subject and the background. For example, when your subject is backlit -

maybe standing in front of a bright window or the sun - and consequently their face is in

shadow. I know I said evaluative mode can often handle this type of situation, but if you

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Canon T3i User Manual Page 10