Canon PowerShot SX10 IS User Guide

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The shutter speed, zoom and aperture value have the 
following relationship.
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The fastest shutter speed for flash synchronization is 1/500 
second*. Therefore, even if the shutter speed is preset to a 
speed higher than 1/500 second, the camera automatically 
resets the shutter speed to 1/500 second during shooting.
* When using an external flash, see pp. 258, 259.
Shutter Speed Display
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The following shutter speeds can be set. 1/160 indicates 
1/160 second. Also, 0"3 indicates 0.3 second and 2" 
indicates 2 seconds.
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You can change the combinations of shutter speeds and 
aperture values without altering the exposure (p. 132).
Safety Shift
With 
 and 
 modes, if [Safety Shift] is turned [On] (p. 54) in the 
 menu, the shutter speed or aperture value is automatically 
adjusted for the correct exposure when it cannot be otherwise 
obtained. Safety Shift is disabled when the flash is enabled.
Aperture Value Shutter Speed (seconds)
Maximum Wide Angle
f/2.8
15 – 1/1600
f/3.2 – 3.5
15 – 1/2000
f/4.0 – 7.1
15 – 1/2500
f/8.0 – 9.0
15 – 1/3200
Maximum Telephoto
f/5.7
15 – 1/1600
f/6.3 – 7.1
15 – 1/2000
f/8.0
15 – 1/2500
15" 13" 10" 8" 6" 5" 4" 3"2 2"5 2" 1"6 1"3 1" 0"8 0"6 0"5 0"4 0"3 
1/4 1/5 1/6 1/8 1/10 1/13 1/15 1/20 1/25 1/30 1/40 1/50 1/60 
1/80 1/100 1/125 1/160 1/200 1/250 1/320 1/400 1/500 1/640 
1/800 1/1000 1/1250 1/1600 1/2000 1/2500 1/3200
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