What is the significance of AEB in SLR?

AEB in SLR means: automatic surround exposure.

Automatically surround exposure, which can cooperate with exposure compensation setting to expand the adjustment range. When the contrast of the shooting scene is too large, the light flashes or it is difficult to determine the exposure value, the AEB mode is turned on for automatic surround exposure, and the camera continuously shoots at least three photos with different exposure compensation values (standard exposure, underexposure and photometric exposure, and the exposure compensation amount of each photo can be adjusted by the user) to obtain the photos with correct exposure.

Extended data:

The principle of automatic bracketing exposure mode is that in some cases, it may be difficult to choose appropriate exposure compensation and white balance settings, and there is no time to check the results and adjust the settings after each photo. Auto bracketing exposure can be used to automatically change these settings for a series of photos, thus "bracketing" the selected exposure compensation or white balance setting.

The auto-bracketing exposure mode of the 7900 provides off (normal exposure and white balance are restored) and auto-bracketing exposure (every time the shutter release button is fully pressed, the camera will take three photos, one of which adopts the current exposure value.

The other two are changed by the compensation value of +05 respectively. -0.5), surrounded by white balance (the shutter button will be shot three times each time to classify the current white balance settings, resulting in a standard white balance photo, a blue tone photo and a red tone photo, and the shooting time is about three times as long as the original).