Operation Manual

n 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

to page 18.)

• 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