Mamiya 645 PRO TL - Manual (Page 35)

Photography with Non-TTL Flash Units
<Caution>
When using the Hot-shoe,
be sure to put an appropriate
Safety Cover over the X-sync
terminal so that you won’t
receive a high voltage
electric shock if the terminal
is accidentally touched. (A
Safety Cover is put on the X-
sync terminal when the
camera leaves the factory.)
1. When using an electronic flash,
plug the synchronization cord into
the Sync Teminal and set the Shutter
Speed Dial to 1/60 sec. or slower.
* The Mamiya 645 PRO has an X-
sync terminal.
Attach a shoe-mount flash to the hot-
shoe of the camera or the Left Hand
Grip GL401 (optional).
Flash synchronization Chart
* Do not use a flash unit
specifically dedicated for another
camera. It may damage your 645
PRO.
* If you use a flash unit whose
flash duration is slower than 1/
1000 sec., set the shutter speed
dial to 1/30 sec. or slower.