Mamiya 645 AF - Manual (Page 35)

Changing The Focusing Screen
1. Remove the lens.
2. Slide the Focusing Screen Release lever “A”
forward, as illustrated, to the left with the twee-
zers to let be Focusing Screen down.
3. Remove the Focusing Screen from the Focusing
Screen Frame by grasping the tab on the edge of
the screen with tweezers as illustrated.
4. In case of attaching, insert your desired
Focusing Screen to the Focusing Screen Frame
properly and then raise the frame until it clicks.
Caution
*Since the Focusing Screens' surfaces are soft and easily damaged, handle them
carefully.
*Never touch the surface with bare fingers. Should dust settle on it, merely blow
away by using a blower.
*If the Focusing Screen needs cleaning, send it to the nearest authorized Mamiya
service center. Do not attempt to clean the surface of the Focusing Screen, as it
is very delicate.
Using the M645 Manual Focus Lenses
When using the M645 manual focus lenses, mount the exclusive viewfinder screen
#314474 (sold separately) and set the focus mode to "M" (manual) to enable shooting
with stop down metering.
1. Mount the M645 lens to the body, set the focus, then set the lens' A/M lever to "M".
Focus confirmation is given in the viewfinder's LCD panel.
2. Select the exposure mode and set the desired lens aperture. (See chart below).
3. Half-press the shutter release button. The shutter speed is displayed.
*With the M645 lens, adjust the exposure by using stop down metering in the
Av exposure mode. The proper exposure cannot be achieved in the "P"
(program AE) or "Tv" (shutter priority AE) exposure mode.
*When the M645 lens is mounted, the exposure metering mode is automatically
set to "S" (spot exposure metering).
*Focusing using the focus mark is possible when the lens brightness is F5.6 or
brighter.
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