Filter
Top Products
109108
Flash metering changes according to the flash unit and lens being
used.
5600HS(D)
3600HS(D)
ADI metering
(HSS on, with pre-flash)
Pre-flash metering
(HSS on)
Built-in flash
ADI metering
(without pre-flash)
TTL metering
5400HS
Pre-flash metering
(HSS on)
Pre-flash metering
(HSS on)
Other accessory
flashes
TTL metering TTL metering
D lens Other lenses
• When the shutter speed is faster than 1/200 sec, flash metering will
be HSS-TTL. If Wireless/Remote flash is set, metering will be
Wireless/Remote-TTL.
When using an accessory flash with HSS function, and if HSS is
turned on, then pre-flash fires and ADI/Pre-flash metering will occur
(blue area of the chart ). When using a D lens, ADI metering is
also done using the built-in flash ( area).
• TTL 4-segment flash metering will be used instead of ADI/Pre-flash
metering, when HSS is off, bounce flash is set, or when an off-camera
cable is used to connect multiple flash units. TTL average metering
will be used instead of ADI/Pre-flash metering when rear flash or the
mirror lock-up function is selected.
TTL metering (Through-the-lens):
The TTL flash metering system determines the flash
exposure automatically.
Pre-flash metering:
A pre-flash fires 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.
ADI metering (Advanced Distance Integration):
Flash metering is controlled by the guide number in addi-
tion to TTL metering. Flash output is less influenced by the
background conditions or the subjects reflectance.
When pre-flash fires, a flash/color meter cannot meter accurately.
This is because the purpose of pre-flash is to assist ADI/Pre-flash-
metering, not to provide illumination for the picture. Cancel HSS
(see flash manual) or eliminate the influence on metering using
Custom 20-2/3 (p. 175). Those items affected are in in the
chart on page 108. 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. For those items in
(p. 108),
cancel the HSS or choose Custom 20-2/3. When using the built-in flash
,
you must choose Custom 20-2/3 .
• Custom 20 gives you the choice of (1) ADI 4-segment flash metering,
(2) TTL 4-segment flash metering, (3) TTL average flash metering (p.
175).
FLASH METERING
FLASH