Measuring the light

Most compact cameras have a small, separate window next to the viewfinder. This window holds a sensor that responds to light reaching it from the whole of the scene you can see in the camera viewfinder. This so-called 'general' light reading is accurate enough for average subjects, such as those in Figures 14.5 and 14.6. In both photographs, the areas taken up by dark parts are roughly equal to the areas occupied by the brightest parts, with the rest of the scene in tones approximately halfway between the two. A general reading of the whole lot averages out all these differences, and the camera settings that are made have produced an exposure that is a good compromise for everything in the picture.

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