Using an external flash (optional) – Pentax K-X User Manual
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Using an External Flash (Optional)
Using the optional external flash AF540FGZ, AF360FGZ, AF200FG or
AF160FC enables a variety of flash modes, such as P-TTL auto flash
mode, depending on the external flash being used. See the chart below for
details.
(z: Available #: Restricted
×: Not available)
*1 Available only when using a DA, DA L, D FA, FA J, FA, F or A lens.
*2 Shutter speed of 1/90 sec. or slower.
*3 When combined with the AF540FGZ or AF360FGZ, 1/3 of the flash discharge can be
output by the built-in flash and 2/3 can be output by the external flash.
*4 Available only when combined with the AF540FGZ or AF360FGZ.
*5 Multiple AF540FGZ or AF360FGZ units, or a combination of an AF540FGZ or AF360FGZ
unit and the built-in flash is required.
Flash
Camera Function
Built-in
Flash
AF540FGZ
AF360FGZ
AF200FG
AF160FC
Red-eye reduction flash
z
z
z
Auto flash discharge
z
z
z
After the flash is charged, the camera
automatically switches to the flash sync speed.
z
z
z
Aperture value is automatically set in e
mode and b mode.
z
z
z
Auto check in the viewfinder
Ч
Ч
Ч
P-TTL auto flash
z
z
Slow-speed Sync
z
z
z
Flash exposure compensation
z
z
z
AF assist light of external flash
×
z
×
Trailing Curtain Sync
z
z
×
Contrast-control-sync flash mode
#
z
#
Slave flash
×
z
×
Multiple flash
Ч
Ч
Ч
High-speed flash sync
×
z
×
Wireless flash
z
×
Flashes with reversed polarity (the center contact on the hot shoe is minus)
cannot be used due to the risk of damaging the camera or flash.