How does Canon 6d measure light?

evaluation metering: the system divides the picture into many squares for weighted metering, and the focus points will be weighted. Please use spot metering for backlighting.

partial metering: It is often used when the light is uneven and the subject light is uneven, such as shooting grapes that are illuminated by light in the dark.

central key photometry: generally, shooting is in the central part and other parts are in light deviation. For example, shooting the Forbidden City and the Memorial Tower in the corridor also includes the corridor.

Spot metering: Spot metering, Canon is about 5% of the central part for spot metering, and then exposure is locked before composition shooting. Just shoot the composition directly in the center. That is, if you want to arrange a white kitten, it will be dark and uneven in the light. It mainly expresses the accuracy of kitten exposure (the degree to which the color is restored to its own color). Spot metering is an essential skill for a photography enthusiast.