How does the G10 exposure compensation actually work?

[marc515]

How does the G10 exposure compensation knob actually work? Does it lighten & darken the exposure digitally, or does it adjust the aperature, or something else?

Thank you again,.....marc

[JeffreyG]

I don't have a G10, but assuming that the exposure compensation is the same as on all other Canon cameras:

EC tells the camera to make a different exposure than it would normally select according to the metering mode and software.

Suppose you are in Av mode and select ISO 100 and f/4. The camera looks at the scene and selects 1/100 seconds.

If you then dial in +1 stop EC the camera will change the shutter speed to 1/50 and the resulting picture will be one stop brighter than it would have been at 1/100.

If you dial in -1 stop EC the camera will change the shutter speed to 1/200.

This is all for just one example condition. Every picture will vary for the actual light.