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FLASH METERING
Two flash-metering methods are available: ADI and pre-flash TTL. The flash metering-
mode can be changed in the basic section of the recording-mode menu (p. 80).
ADI flash metering - Advanced Distance Integration. This metering mode combines
distance information from the autofocusing system with information from a pre-flash
exposure. Unlike conventional TTL flash metering, ADI is not influenced by the
reflectance of the subject or background, ensuring optimum flash exposures.
Pre-flash TTL - calculates flash exposure with a pre-flash only. This mode must be
used when using close-up filters or filters that reduce the amount of light entering the
camera such as neutral density filters. Pre-flash TTL must be used when a diffuser is
attached to the built-in flash or an external flash unit.
The camera will automatically switch from ADI metering to pre-flash TTL when a low-
contrast subject is preventing the autofocus system from focusing. If the autofocus
system cannot lock on the subject, press the AF/MF button and manually focus; the
ADI metering will remain in effect.
This camera does not have a preset flash sync speed. When calculating the exposure
in program (P) or aperture-priority (A) exposure mode, the shutter speed will not fall
below the camera-shake limit (p. 15). When using shutter-priority (S) or manual (M)
exposure mode, any shutter speed can be used in the exposure.
For a list of compatible Minolta accessory flash units and for information on accessory
flash operation, see page 138. Because both flash modes use a pre-flash, slave
controlled flash units cannot be used.