Canon EOS 30D Instruction Manual page 179

Program Line
The following program line applies when the camera is in Program AE
<P>
mode.
- EF50mm f/1.4 USM
- - - EF-S17-85mm f/4-5.6IS USM
: WIDE17mm
••••• EF-S17-85mm f/4-5.6IS USM
: TELE85mm
,
,
, ,
,
,
~~
,
, ,
~~
"
,
~~
"
"
~~
~,
~~
~,
8 4 2 1 2 4 8
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
32
t
22)::-
16~
;::+
11
~
8
5.6
4
2.8
2
1.4
1.0
15 30 60 125250 500 1000200040008000
Shutter speed ...
~~
2
1
a
-1
-2
-3
-4
-5
EV
30 15
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.
I
The diagonal arrowed lines at the upper left indicate the
metering range for each ISO speeds.
179