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P-TTL Auto Flash
1
Turn on the power switch (ON).
2
Press the flash mode button (MODE) until P-TTL is
displayed on the LCD panel.
3
Press the sync mode button (SYNC) to cycle through the
display of: leading curtain sync (
) → trailing curtain
sync (
) → contrast control sync (
)
→ high-speed sync (
). Select sync mode best suited
for the subject. (Refer to page 31.)
• When turning on the power switch (ON), P-TTL and auto
zoom (Zoom) are set.
4
Set the zoom position (flash coverage angle).
• The setting method differs according to your camera and
lens. (Refer to page 21.)
5
Confirm that the subject is within the effective flash range
and the Ready lamp is lit. Then take a picture.
• The correct flash output is obtained in P-TTL mode only
when the flash unit is used with autofocus lenses.
• If necessary, an exposure compensation amount can be
set in the range of -4.0 to +2.0 by 1/3, or 1/2 step. (Refer
• When the camera’s exposure mode is other than manual
(M), bulb (B) and flash X-sync speed (X), even if you set
the flash mode of this flash unit to manual (M), it will
automatically switch to P-TTL while the camera’s
exposure meter is operating (while information is being
displayed in the viewfinder). (With the 645D, if the
aperture of the lens is in a position other than A, the flash
mode will switch to TTL.)
P-TTL auto flash
AF360FZ_540FGZ.book Page 25 Friday, December 20, 2013 6:11 PM