Canon PowerShot Pro 90 IS User Guide

Page of 140
Shooting - Selecting Particular Effects   
61
• 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      500      400      320      250      200      160      125      100
80      60      50      40      30      25      20      15      13      10      8      6      5      4
0"3      0"4      0"5      0"6      0"8      1"      1"3      1"6      2"      2"5      3"2      4"
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.
1/1000 sec. .  .  .
1/4 sec.
.  .  .
0.8 sec.
.  .  .
8 sec.
.  .  .
.  .  .
.  .  .
1/1000
.  .  .
1/4
.  .  .
0"8
.  .  .
8"
Shutter Speed
Display Panel
LCD Monitor/Viewfinder