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.
*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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