Metering Modes: Evaluative, Center-Weighted, Spot

Metering Modes: Evaluative, Center-Weighted, Spot

Your camera measures the brightness of the scene to calculate the correct exposure. The way it measures that light is called the metering mode, and different modes give different results. The three most common metering modes are evaluative, center-weighted, and spot. Each mode samples the light in a different pattern, and choosing the right one for the situation helps you get the exposure right in-camera without guessing.

Evaluative metering, also called matrix or multi-segment metering, is the default mode on most cameras. It divides the frame into multiple zones and analyzes each zone's brightness, contrast, and color. The camera then uses a sophisticated algorithm to determine the best exposure. Evaluative metering works well for most everyday situations because it considers the entire scene and is smart about balancing different brightness areas. It is the best choice for general shooting.

Center-weighted metering gives more importance to the center of the frame and less to the edges. It was the standard metering mode before evaluative metering existed. Center-weighted metering is useful when the subject is in the center and the background is significantly brighter or darker. A portrait with a bright sky behind the subject is a classic situation. Center-weighted metering ensures the subject's face is correctly exposed even if the sky is blown out.

Spot metering measures only a small area in the center of the frame, typically two to five percent of the total area. This gives you precise control over exposure for a specific part of the scene. Spot metering is essential for high-contrast situations where you need to expose for a specific element. A performer on a dark stage lit by a single spotlight, a bird against a bright sky, or a backlit subject are all situations where spot metering gives you the best results.

Many cameras also have highlight-weighted metering, a newer mode that prioritizes preserving highlight detail. It biases the exposure toward the brightest areas and lets the shadows fall where they may. This is useful for preventing blown highlights in scenes with bright areas, like wedding dresses, snow, or clouds. Highlight-weighted metering works well with raw files because you can lift the shadows in post, but clipped highlights are permanently lost.