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Flash Metering

Flash metering changes according to the lens used.

ADI flash metering

Advanced Distance Integration (ADI) metering is employed when using D series lenses. ADI metering combines distance information from the autofo- cusing system with information from a pre-flash exposure. Unlike conventional TTL flash metering, ADI is not influenced by the reference of the subject or background ensuring optimum exposures.

ADI metering

Conventional TTL metering

Pre-flash TTL

Pre-flash TTL metering is used with non-D series lenses or when a wireless / remote flash or bounce flash is used. Like ADI metering, Pre-flash TTL compensates for difference in transmission in the optics by measuring the flash output through the lens, but does not use distance information to calculate the exposure.

Flash Notes

The certain accessories will prevent proper exposure when used with the camera during flash photography. Do not use filters which alter the required exposure such as neutral density or polarizing filters. Do not use close-up filters or lenses on the camera lens, or a close-up diffuser with the flash.

An accessory flash cannot be connected to the camera using a cable. For more on flash accessory compatibility, see page 56.

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