Mamiya 645 AFD III User Manual download pdf (Page 32)

2. Press the SET button or exposure metering

mode button A to enter the setting.

Exposure metering is performed after automatically

selecting average/spot exposure metering.

• Depending on the subject conditions, center-

weighted average/spot exposure metering is selected

automatically, and the correct exposure is measured.

• Spot exposure metering is automatically selected

when the brightness of the spot exposure metering

range becomes darker than the brightness of the

entire screen.

• If there is very little difference between the spot

exposure metering value and center-weighted aver-

age exposure metering value, the correct exposure

level is obtained as the intermediate value.

The average brightness of the entire screen is mea-

sured, emphasizing the center of the screen.

The brightness of an area equivalent to 7.6% at

screen center is measured, and the exposure is de-

termined. The circle at screen center serves as a

general guideline. This mode is suited to measuring

subjects with strong contrasts or measuring only

screen portions.

Average/spot auto

exposure metering

Center-weighted aver-

age/spot exposure

metering

Center spot exposure

metering

Exposure Metering Modes

Exposure warnings

With an inappropriate exposure setting, when shooting subjects that are too light or

dark, the user is warned by the flashing external LCD or the LCD inside the viewfinder.

At such times, the correct exposure cannot be obtained.

Warnings that the exposure is outside the metering range

○ Program AE (P) ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥

The shutter speed and f-number blink.

○ Aperture priority AE (Av) ‥‥‥‥‥‥‥‥‥‥‥‥

The shutter speed blinks.

○ Shutter priority AE (Tv) ‥‥‥‥‥‥‥‥‥‥‥‥‥

The f-number blinks.

○ Manual mode (M) ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥

The exposure metering value difference is displayed.

The time used for the metering timer can be changed.

Custom settings (C-04 on page 93)

How to select an exposure mode

1. Exposure mode mark is displayed when the

exposure mode button A is pressed. Since three

different exposure modes are displayed sequen-

tially when either the front or rear dial is turned,

select an appropriate exposure mode.

There are three exposure metering mode to select a proper exposure modes appropri-

ate to the lighting condition of subject.

61 62

Exposure Metering Modes

Exposure Metering Modes / Exposure warnings

Important

● When a polarizing filter is used, ensure that a circular polarizing filter

(circular filter: C-PL) is used. The correct exposure cannot be obtained

with a normal polarizing filter (PL).

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Mamiya 645 AFD III User Manual Page 32

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