Diopter Adjustment; Focusing - Mamiya 645E Instruction Manual

Diopter Adjustment

1. To assure correct focusing, set the Diopter Adjustment for your eyesight.
2. Rotate the Diopter Adjustment Ring until you can clearly see the lines on the camera's focusing screen.
3. Next, turn the lens' Focusing Ring until a selected object in the Viewfinder is sharp and clear.
4. Make fine adjustments with the Diopter Adjustment Ring.
5. When the adjustment is correctly set, note the setting on the Diopter Adjustment Ring for future
reference.

Focusing

The camera comes with a bright, rangefinder-spot focusing screen, which features a center, split-image rangefinder
spot.
While focusing, when the split-image combines into one, the subject is in sharp focus.
The microprism ring around the split-image also facilitates focusing. The microprisms only disappear when the
subject is in focus.
The outer ground-glass area of the screen can also be used for focusing.
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