User Manual

7.1.24 Shutter in M/X

This menu is applicable when a Mamiya 645DF

camera is used in

either M or X exposure modes with a leaf shutter lens. Using the X

(ﬂash synchronization) mode limits the shutter speed range from 1/60th

second to 1/125 second irrespective of the selected (Mixed, Leaf or

Focal Plane) mode. Select Manual (M) mode and select one of the

following options:

Mixed: The leaf shutter range from 1 second to 1/1600th second are

selected. Shutter speeds above and below that range use the focal plane

shutter. Flash synchronization is possible on all leaf shutter speeds.

Leaf: Shutter speeds are limited to a leaf shutter range from 1 second

to 1/1600th second. Flash synchronization is possible on all shutter

speeds.

Focal Plane: Shutter speeds range from 1 minute up to 1/4000th

second. Flash synchronization is only possible from 1/60th to 1/125

second. (Depending on the ﬂash being used).

Note: The LCD screen on the Mamiya 645DF

either displays an LS

(Leaf Shutter) or FS (Focal Shutter) icon to correspond to the shutter

speed or custom camera setting. Selecting a shutter speed outside of

the leaf shutter range forces the camera to switch to the focal plane

shutter.

7.1.25 AF priority

Select one of the following AF (Auto Focus) priority options:

Speed: This mode is ideal when capturing moving subject matter.

Accuracy: This the default setting. It is particularly recommended when

the Mamiya 645DF

is used with a lens with a long focal length.