Canon Power Shot A400 User Manual page 52

Shooting – The Basics
Portrait
Indoor
In and modes, the shutter speed slows down. Use a tripod to avoid camera shake.
In and modes, the ISO speed may increase and cause noise in the image.
See page 138 for settings that can be changed in this mode.
Results may vary depending on the subject.
When shooting images underwater, always turn the power off before inserting the camera into
the All Weather Case AW-DC20 (sold separately).
Using the All Weather Case AW-DC20 (sold separately) is recommended in
50
Night Scene
Underwater
Foliage
Fireworks
Snow
Beach
and modes.