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5
4
3
2
1
0
-1
-2
-3
-4
30 15
8
4
2 1
1/2
1/4
1/8
1/15 1/60
1/250 1/1000 1/4000
1/30 1/125
1/500 1/2000
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EV
Shutter speed
(ISO100/AF80mm F2.8 D)
F
32
22
16
11
8
5.6
4
2.8
645AFDIII program shift chart
Normal
Program shift area
When the Program line is shifted, the aperture value changes along with the shutter
speed to maintain the proper exposure.
P
Av
T
v
M
X
CF
A
P
A
v
T
v
M
X
C
F
PL Normal PH
53 54
Program AE (P)
The aperture and shutter speed are determined automatically for the optimum exposure,
according to the existing ambient light. This mode is best suited for general photography,
allowing the user freedom to concentrate on the subject.
Exposure Modes
If a correct exposure cannot be obtained, the shutter speed and aperture value blink.
In such cases, the pictures can be taken but they may turn out too bright or too dark.
Hold down the button A and turn the exposure
mode setting dial to “P” (program AE) position.
Program Shift (PH/PL)
You can change the shutter speed and aperture by turning the front and rear dials in the
“P” (Program AE) mode. In order to avoid blurred images (shake while releasing the
shutter), or to open the aperture, change to “PH” (high speed). For slower shutter speeds
and wider depth of field, change to “PL” (low speed). This function allows you to make
these changes quickly.
1. You can choose either aperture or shutter-speed to give priority in
program line shift. Custom settings (C-14 on page 94)
2. Increment of the aperture and shutter speed can be set at either 1/3 or
1/2-stop. Custom settings (C-01 on page 93)