The bracketing is typically for one specific parameter:
Exposure Exposure autobracketing (often abbreviated to
AEB for
automatic exposure bracketing or
BR for
Bracketing) is the most common form. In this, the camera is set to capture the same image several times with different
exposure settings, both over-exposed and under-exposed (lighter and darker) compared to the current setting on the camera, which may already include
exposure compensation. Depending on the camera, the difference between each of the autobracketed shots could be anywhere from one-quarter
Flash Automatic flash bracketing (sometimes abbreviated to
FBR for
flash bracketing or
FEB for
flash exposure bracketing) is typically performed by altering the flash output of a connected dedicated flash accordingly. Using non-dedicated studio flashes, for example on the
PC socket, flash bracketing can be carried out by altering the aperture, however, this will also affect ambient light and the
depth of field. If, in manual mode, a camera defaults to alter the shutter speed, it might be necessary to swap the parameters used for shifting in order for the camera to alter the aperture instead. Since the flash may need time to recharge between the shots, some cameras fall back to single-advance drive mode during auto flash bracketing, even if they are otherwise configured for continuous-advance drive.
ISO Automatic ISO bracketing simulates exposure bracketing by altering the ISO or signal
gain prior to conversion of the image to JPEG or other image file format. The actual exposure values (aperture and shutter speed) are usually kept constant. Auto ISO bracketing is not a common feature of digital cameras.
White-balance Another common form of autobracketing is
white balance autobracketing (sometimes abbreviated to
WBB for
white balance bracketing); this applies only to digital cameras, not to film cameras. This function provides a way of dealing with mixed lighting by having the camera take one shot and process the raw sensor data several times for slightly different white point settings, with both higher and lower
color temperatures (bluer and redder) compared to the current setting on the camera. Typically, the amount of offset can be configured. Since shooting in a camera's
raw format (if supported) the white balance can be arbitrarily changed in postprocessing as well at a later stage, white balance bracketing is particularly useful for reviewing different white balance settings in the field.
Focus with the features of the fly closest to the camera. The center image shows the features farthest from the camera. The image on the right shows
focus stacking: a sequence of six incrementally focused images of the fly assembled to make a composite image using
CombineZM.
Depth of field The
Minolta Maxxum 7's STF function is an automatically calculated and
pre-compensated seven-fold multi-exposure with
depth-of-field bracketing which emulates the smooth
bokeh effect of
Smooth Trans Focus. ==Dual-bracketing==