The Canon EOS Digital Rebel XSi/450D Companion

ADVANCED EXPOSURE

USING EXPOSURE COMPENSATION TO OVER OR UNDEREXPOSE

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Using Exposure Compensation to Over- or

Underexpose

Now that you’ve seen some of the occasions when you might want to over- or

underexpose, we’ll look at one of the ways that you can tell the camera to make

such an exposure adjustment. ere are many ways of controlling exposure on

the XSi, but the easiest method is to use exposure compensation.

ese days, almost all cameras have an Exposure Compensation control, which

simply lets you make a relative exposure change. at is, you can tell the camera,

“I don’t care how you metered the scene; I just want you to go up from there by 1

stop.” Try using exposure compensation now:

Frame a shot.

1.

Press the shutter button down halfway to meter your scene (the camera will

2.

also autofocus and take a white balance reading).

After the camera beeps, the viewfinder and status LCD will show you the shut-

3.

ter speed and aperture settings that it has calculated.

Take the shot.

4.

Now frame the same shot, and again press the shutter button halfway down

5.

to meter the scene.

Using your thumb, press the Exposure Compensation button on the back of

6.

the camera.

Dial in a specific amount of over- or underexposure.

Rotating the main dial Exposure Compensation display in the viewfinder indi-

7.

cates a one-stop overexposure. (If you haven’t changed the camera’s defaults,

then this will be thr ...