This is from the Digital Camera Battery whole scene metering modes in a very small range to read light intensity, often the scope of the whole scene metering accounts for less than 3% ~ 5% of the proportion of the region, compared with the whole picture, can be approximately as a point. Through the CCD or CMOS corresponding pixel photographic, calculating the area of brightness values, according to 18% gray adjust exposure.
Center-weighted average metering or spot metering general CANON NB-4L Battery measure is located in the central part only metering points parts of the light, no other part of the light in the scene, and is suitable for comparative and intense light conditions, smooth shadow of under the environment of the big contrast to the foreground subject to the correct exposure. But in the backlight filming, will make the main has a gloomy shooting results.
General center-weighted average metering or spot metering mode in the subject to highlight the conditions of use. But practical process needs very precise, have a bit inadvertent will affect the CANON NB-5L Battery whole picture exposure. At present, a good digital camera has ae lock function, can spot metering and used together. That is when shooting, first on the implementation of main body center-weighted average metering or spot metering, ae lock, composition and take pictures again. This photo taken out of the success rate is too large.
Some of the digital camera AE lock and focus shooting subject, half the shutter 3 A adjustment (AE, AF, AWB-automatic metering, AF, automatic white balance adjustment), cameras adjusted the 3 A, and then the lens move subjects and taking pictures of the composition; Some digital camera CANON NB-6L Battery no exposure and focus lock function, the camera to use center-weighted average metering or spot metering taking pictures, need to just take a center-weighted average metering or spot metering get exposure data, then the camera shooting mode to M block, according to exposure metering data set value, and then to focus and take photos.
