Canon EOS 30D - Manual (Page 179)

179
The following program line applies when the camera is in Program AE
<d> mode.
Program Line Description
The lower horizontal axis represents the shutter speed, and the right-
hand vertical axis represents the aperture. The combinations of shutter
speed and aperture automatically determined by Program AE are
shown as lines with respect to the subject brightness (Exposure Value)
gradations on the left and top edges of the graph.
Example:Using an EF-S17-85mm f/4-5.6 IS USM lens with a subject
brightness of EV8, the point where the diagonal line from EV8
(on the top edge) intersects the Program AE line represents
the corresponding shutter speed (1/15 second) and aperture
(f/4) that the program sets automatically.
The diagonal arrowed lines at the upper left indicate the
metering range for each ISO speeds.
Program Line
ISO 100
200
400
800
1600
-1
-2
-3
-4
1.4
-5
30 15 8 4 2 1 2 4 8 15 30 60 125 250 500
Shutter speed
1000 2000 4000 8000
1.0
2
2.8
4
5.6
8
11
16
22
32
11 12 13 14 15 16 6 7 8 9 10 17 18 19 21 23 20 22
4
3
2
1
0
EV
5
Aperture
EF-S17-85mm f/4-5.6 lS USM
: WIDE17mm
EF-S17-85mm f/4-5.6 lS USM
: TELE85mm
EF50mm f/1.4 USM