Being able to accurately measure light for a given scene is critical to making correct exposures and successful photographs. Most of today’s cameras come equipped with built-in light meters, which can be used in a number of different modes. Evaluative, or matrix, metering is the default metering mode of most DSLRs. It samples light from a number of “zones” within the frame, then analyzes each zone for highlights and shadows, giving you a readout based on those calculations. This mode works well in evenly lit scenes that don’t have a lot of contrast, and it’s a great place for beginners to start.