Using High-Speed Flash Sync Mode - Pentax K-5 Operating Manual

• P-TTL Auto is only available with an AF540FGZ, AF360FGZ, AF200FG or
AF160FC flash unit.
• The b will light in the viewfinder when the flash is ready (fully charged).
• For details such as operation method and effective distance, please refer to
the external flash manual.
• The flash does not discharge if the subject is bright enough when the flash
mode is C or i. Therefore, it may not be suitable for Daylight-Sync
shooting.
• Never press the E button when any external flash unit is attached to the
camera. The built-in flash will hit the external flash. If you want to use both at
once, set the wireless mode or connect them using the extension cord.
(p.194)

Using High-Speed Flash Sync Mode

With the AF540FGZ or AF360FGZ, you can discharge the flash to take a
picture at a shutter speed faster than 1/180 second.
1
Remove the cover of the hot shoe and attach the external
flash (AF540FGZ or AF360FGZ) to the camera.
2
Set the exposure mode to b or a.
3
Turn on the camera and the external flash.
4
Set the external flash sync mode to HSb (High-speed
flash sync).
5
Confirm that the external flash is fully charged and then
take a picture.
• The b will light in the viewfinder when the flash is ready (fully charged).
• High-speed flash sync is available only when the shutter speed is set faster
than 1/180 sec.
• High-speed flash sync is not available when the exposure mode is set to p
(Bulb).
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