Olympus CAMEDIA C-150 Reference Manual page 52

Flash off ( )
The flash does not fire even in low light conditions. Use this mode in
situations where flash photography is not desired or is prohibited, such as in
an art museum. You can also use this mode when you want to shoot a
natural-looking twilight or night scene.
• Since a slow shutter speed is automatically selected in low light
situations when in the flash off mode, the use of a tripod is
Note
recommended to prevent your pictures from being blurred by
camera movement.
Using the flash
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