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FLASH — Four Segment Flash Metering
FLASH
Four segment flash metering uses data from
the focus sensors to control the output of the
built-in and/or attached accessory flashes.
The TTL flash metering system determines the flash
exposure of the area inside the selected focus area
after the shutter has been released.
• Average flash metering is set instead of 4-segment flash
metering when the 2 second self-timer or rear-flash sync
are selected or when the depth-of-field preview button is
held when the shutter is released.
4-Segment Flash Metering
Conventional Flash
Select setting 2 to meter all segments evenly. Switch to setting 3 to
spot meter your flash exposures (p.102).
Custom Function Notes
Maxxum/Program Flash 5400HS Note
When used with the 5400HS, a preflash is fired before the main exposure.
The preflash is metered (14 segment) and fed back to the flash exposure
system to more accurately determine the flash exposure.
• The 5400HS will not fire a preflash if does not appear in the flash data panel or
when rear flash sync, wireless flash, or the 2 second self timer are selected.
• Flash and color meters cannot meter the flash when the high-speed sync indicator
appears in the flash data panel.
All four segments are used to meter the flash, but
weighting is heaviest on the segment containing the
active focus sensor. Weighting varies with subject
magnification and the distance between the subject
and the background.
FLASH