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and HSS off
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D lens and
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95
DETAILED
OPERATION
94
• When an off-camera cable or bounce flash is used, the TTL metering mode
will be automatically set.
• If Wireless/Remote flash is used, the TTL metering mode will be automatical-
ly set.
TTL metering (Through The Lens):
The TTL flash metering system controls the flash during the
exposure automatically.
Pre-flash metering:
In combination with TTL metering, a pre-flash fires before the
main exposure. The pre-flash is metered with 14 segment
honeycomb pattern and fed back to the flash exposure sys-
tem to determine the reflectance of the scene.
ADI metering (Advanced Distance Integration):
Flash metering is controlled by distance information from D
series lenses in addition to TTL metering. With the 5600HS
(D) and 3600HS (D) accessory flash units, a pre-flash is also
used. With ADI metering, flash output is less influenced by
background conditions or the subject’s reflectance.
5600HS(D)
3600HS(D)
Built-in
flash
ADI metering
without pre-flash
5400HS
Pre-flash
metering
Other
flashes
–
Flash Metering
Flash metering changes according to the flash unit and lens being used.
The metering mode also changes when the HSS mode on the flash is
turned on or off.
FLASH
• For more information on HSS (high-speed sync) flash mode, see page 97.
ADI metering
with pre-flash
TTL
metering
ADI metering
without pre-flash
–
TTL metering
Pre-flash
metering
TTL metering
Pre-flash
metering
TTL metering
– TTL metering
– TTL metering
The accessory flash units fit in the shoe located on
the top of your camera.
Attaching the Accessory Flash
When pre-flash fires, a flash/color meter cannot meter accurately. This
is because the purpose of pre-flash is to assist ADI/Pre-flashmetering,
not to provide illumination for the picture. Cancel HSS (see flash man-
ual) or eliminate the influence on metering using Custom 12-2 (p.
113). However, if you use the test-flash button on the flash, the pre-
flash will not fire.
Use of a Flash/Color Meter with Pre-Flash
When Using a Close-up Diffuser, Certain Filters and Lenses
When close-up diffuser CD-1000, or a filter whose stop’s increase is
not 0 (i.e., ND) is used, or when the focus-range limiter or macro release
of certain lenses are used, the proper exposure will not be obtained by
ADI or Pre-flash metering.
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