Pentax 540FGZ - AF - Hot-shoe clip-on Flash Operating Manual page 79

Auto zoom electronic flash unit
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Slow-Speed Sync Photography Restrictions
Be sure to set the camera as follows.
- Shutter speed: slower than flash unit's X-sync speed
- Exposure mode: manual exposure, Shutter Priority AE, (except 645, SFX
(Bulb Exposure)
Exposure modes other than the above are not compatible with this photographic method. Refer to
the Exposure Modes Not Supported by Slow-Speed Sync Photography column.
You cannot perform slow-speed sync photography with settings other than B (Bulb Exposure) with the following
cameras:
- Cameras that are not capable of setting the shutter speed slower than the flash X-sync speed
- Cameras in which the shutter speed is automatically switched to the X-sync speed when the flash unit has been
charged.
Camera Model
K200D, K100D Super, K110D,
K100D, *ist DL2, *ist DS2,
*ist DL, *ist DS, *ist,
MZ-L/ZX-L/MZ-6, MZ-7/ZX-7
K20D, K10D, *ist D
Exposure Modes Not Supported by
Slow-Speed Sync Photography
, , ,
AUTO PICT,
P (except *ist and MZ-L/ZX-L/MZ-6), SCN
(K200D, K100D Super, K110D, K100D,
*ist DL2), Av (Aperture Priority) modes
Green, Hyper Program (when
programmed AE is activated) and Av
(Aperture Priority) modes
/SF1
, SFX/SF1 and SF 7/SF10), B
N
N
,
,
,
You can perform slow-speed sync
photography using the following
method when the camera is in Hyper
Program mode.
- Set the camera using the Av dial or
Tv dial so that the shutter speed is
slower than 1/150 sec.
Notes
77

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