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CUSTOM 11 - FLASH METERING
The metering mode for both the built-in and accessory flash can be
specified:
1 ADI Flash Metering. When the flash fires, ADI or pre-flash TTL
metering will be employed. Flash metering changes according
to the flash unit and lens being used, see below.
ADI (Advanced Distance Integration) metering uses the
distance information from D series lenses in addition to TTL
metering during the exposure. With the 5600HS (D), 3600HS
(D), and 2500 (D) accessory flash units, a pre-flash is also used.
With ADI metering, the exposure system is less influenced by
background conditions or the subject’s reflectance. Pre-flash
TTL uses a pre-flash to determine the reflectance of the scene
as well as controlling the flash output during the exposure.
2 TTL (Through The Lens) Flash Metering. The TTL flash
metering system controls the flash during the exposure
automatically. No pre-flash is used. To use flash or color meters,
or neutral density filters, the flash mode must be set to TTL
metering.
Flash D series lens Other lenses
Camera flash ADI TTL
Program/Maxxum
5600HS (D)*
3600HS (D)*
2500 (D)
ADI
(with pre-flash)
Pre-flash TTL
Program/Maxxum
5400HS*
Pre-flash TTL Pre-flash TTL
Other flash units TTL TTL
* HSS (High Speed Sync.) must be active. If off, TTL metering is
used.