Canon POWERSHOT SX100 IS User Manual page 19

86I
Shooting Using the Mode Dial
ITv Setting the Shutter Speed []
[] See Functions Available in Each Shooting Mode (p. 222).
When you set the shutter speed, the camera automatically selects an
aperture value to match the brightness of the subject. Faster shutter
speeds allow you to catch an instantaneous image of a moving
subject, while slower speeds create a flowing effect and allow you to
shoot without a flash in dark areas.
1. Use the control dial to change the
shutter speed.
Shoot. ........................................................................................................................
If the aperture value is shown in red: the image is
underexposed (insufficient light) or overexposed (too much
light). Use the control dial to adjust the shutter speed until the
aperture value shows in white (Safety Shift (p. 89)).
_ The nature of CCDs is such that noise in the recorded image
increases at slow shutter speeds. This camera, however,
applies special processing to images shot at shutter speeds
slower than 1.3 seconds to eliminate the noise, thereby
producing high-quality images. (However, a certain amount of
processing time may be required before the next image can be
shot.)
Shu_erspeed