Canon PowerShot Pro 90 IS Software Starter Manual page 63

• At a shutter speed of 1/1000 second, the aperture presets to a value between F4.0
and F8.0.
Shutter Speed Display
The shutter speeds from 1000 to 4 in the display are actually the denominator of a
fraction of a second. For example, 160 indicates a speed of 1/160 second. For
slower speeds, quote marks indicate the decimal place, so that 0"3 indicates 0.3
second and 2" indicates 2 seconds.
1000 800 640
80 60 50
0"3 0"4 0"5
5" 6" 8"
The display of shutter speeds from 1/4 to 1/1000 second differs between the
display panel and LCD monitor or viewfinder.
Shutter Speed
Display Panel
LCD Monitor/Viewfinder
500 400
40 30 25
0"6 0"8 1"
1/1000 sec. . . .
. . .
. . .
1/1000
Shooting - Selecting Particular Effects
320 250 200
20 15 13
1"3 1"6
. . .
1/4 sec. 0.8 sec.
. . .
. . .
1/4 0"8
160 125
10 8 6 5
2" 2"5 3"2
. . .
8 sec.
. . .
. . .
8"
100
4
4"
61