Pentax AF540FGZ - Manual (Page 40)

38
Advanced Functions
■ Wireless Mode
With the AF540FGZ, you can take photographs with
the flash unit separated from the camera wirelessly in
P-TTL mode.
Combine the flash unit with the built-in flash unit of the
camera or another AF540FGZ attached to the camera.
●
The AF360FGZ can be used interchangeably with
AF540FGZ flash units for wireless mode
photography.
Before photographing, confirm the following.
1. Whether your camera supports this function.
➝ Cameras that Support Wireless Mode
(page 63)
2. Whether you can use this function with the
combination of your camera and the flash mode
you have set.
➝
Functions Related to Each Flash Mode
(page 64 - 71)
3. Whether the slave mode is set to SL1.
➝
Slave Mode Setting (page 52)
When using the AF540FGZ in wireless mode, the
following information is transferred between the flash
units attached to the camera and separated from the
camera, before the flash units are fired.

Shutter release button is fully pressed.
 The flash attached to the camera emits a small
control flash (relays the flash mode of the
camera).
 The external AF540FGZ emits a pre-flash
(verifies the state of the subject).
 The flash attached to the camera emits a small
control flash (relays the flash output amount to
the external AF540FGZ).
● The flash attached to the camera will emit a pre-
flash once more after this to relay the flash
duration time when HS (high-speed sync) is set.
 The external AF540FGZ fires the main flash
(where both flash units fire main flashes, refer to
page 44).
Notes on Wireless Flash Control
(P-TTL photography)
00_AF540FGZ.book Page 38 Monday, April 10, 2006 11:42 AM