When the sun is placed away from the center of the frame, it has very little influence on metering. This is true because most of the data the meter gathers in determining a proper exposure comes from the center of the frame. The spot metering mode reads the center 3 to 5% while center weighted mode reads about 9% of the frame. Both modes only read the center of the picture. Matrix metering also takes most of its data from the center but also takes into consideration (as a small percentage of the reading) from the periphery.
In this picture taken in Santorini, Greece, for example, I positioned the ball of the sun near the bottom of the frame. Therefore, when I took a meter reading of this composition, the sun has minimal influence. The settings for this picture were 1/640, f/6.3, 70-200mm lens set to 130mm, ISO 200.
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