Canon POWERSHOT S100 User Manual page 106

The ND filter reduces light intensity to 1/8 (3 stops) of the actual level,
allowing for slower shutter speeds and smaller aperture values.
Choose ND filter.
: After pressing the @ button, press the
AY buttons to choose 1OFF •
Choose N D.
Press the _ _ buttons or turn the _ dial to
choose ND, then press the @ button.
You can make the main subject, such as people, appear bright by having the
camera provide the appropriate illumination with the flash. At the same time,
you can use a slow shutter speed to brighten the background that the light
from the flash cannot reach.
Choose_*.
After pressing the _ button, press the ,_ _,
buttons or turn the _ dial to choose {_,
then press the @ button.
If the flash is lowered, it will automatically
raise.
Once set, _* will appear on the screen.
....Shoot.
Even if the flash fires, ensure that the main
subject does not move until the shutter
sound ends.
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