Metering (Metering)

Digital camera metering system in accordance with the shooting environment to different metering mode (following the specific analysis) measurement of luminance, and calculates an optimal exposure value, make photos accurate exposure. AE is all digital cameras come with standard exposure program, as long as you choose good metering mode, turn the lens alignment is a singularly objects, gently press the shutter, an exposure accurate picture

Digital camera metering system in accordance with the shooting environment to different metering mode (following the specific analysis) measurement of luminance, and calculates an optimal exposure value, make photos accurate exposure.

AE is all digital cameras come with standard exposure program, as long as you choose good metering mode, turn the lens alignment is a singularly objects, gently press the shutter, an exposure accurate picture immediately rendered (in most cases).

Metering mode means the metering system according to what information in your environment to what law photometric calculation reasonable exposure value.

Metering mode with the camera model and brand, but most can be divided into the following 3 types:

Matrix metering or evaluation of metering

This is a comprehensive strongest metering mode, basic in any environment, figure out the most accurate exposure.

The essence of the matrix metering is to take the environment into a multiple metering zones of matrix, the system for each region independently metering, and then to a set of algorithms calculate the best exposure value. Therefore, the camera metering system of algorithms is the key to determining the exposure value, a digital camera manufacturer generally does not disclose the algorithms for details. But we know that this set of algorithms are usually based on the shooting environment and some typical scenarios for comparison to calculate a reasonable exposure value.

Central-weighted average metering

This is the most common digital camera metering mode, almost all digital cameras come with this type of metering mode, some no metering mode selection of digital camera's default metering mode is the central focus of average metering mode.

This metering mode the whole screen, the average measuring light, but with a particular focus on the Center area. The central focus of average metering is widely applied in portrait photography.

Point (partial) metering

Point metering allows users to screen center absorbed object focus metering (some cameras are also available on the selected AF point).

At the point of metering mode, move the camera only on a small area metering, ignore the rest of the screen. This metering mode is typically used for shooting silhouettes, macro and shoot the Moon, and so on.