Pentax 645 - Using Ordinary Flash Units.51

USING ORDINARY FLASH UNITS
Shutter speed ranges for flash synchronization
Shutter speed
1/1000 1/500 1/250 1/126 1/60 1/30 1/15 1/8 1/2 1 ~ 15 B
Electronic
flash units
Electronic flash unit
Flash bulbs
MF flash bulbs
M and FP flash bulbs
Electronic flash units
When using a clip-on type flash unit equipped with
a hot shoe bracket, attach the same directly onto
the hot shoe of your Pentax 645. Should a
cord be required for flash/camera connection,
utilize a synch cord to fit into the camera's X-synch
socket. As indicated in the above table, flash
synchronizatin is possible at the shutter speeds
from 1/60 sec. through 15 secs., and B.
It is recommended that other makes of flash
units, particularly dedicated types for other
cameras, or specific purpose types not be utilized;
doing so may cause malfunctions and/or damage to
the electronic exposure control system of the
Pentax 645.
Flash bulbs
By connecting a synch cord to the X-synch socket,
the use of an independent flash gun is possible.
With the MF type flash bulbs, select any of the
shutter speeds from 1/30 sec. through 15 secs,
including the B position; the M/FP type will permit
flash synchronization within the range of 1/15 sec.
to 15 secs, and B.
For detailed use of flash units, flash guns or flash
bulbs, refer to the operational instructions on
the respective units.
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