Pentax *ist Operating Manual page 105

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MEMO
• The built-in flash automatically retracts only when the power is turned off.
Push down the built-in flash into the camera body when not in use.
• The built-in flash does not discharge when not required even though it is
been in the up position.
• When the built-in flash is used, using the lens hood is NOT recommended
as it may obstruct the path of the light coming from the flash, causing
vignetting in the picture corners.
• Note that the built-in flash automatically pops up in necessary
conditions even if an inappropriate lens for flash shooting is used. See
page 114 to check the compatibility between the built-in flash and
various lenses.
• When using an inappropriate F or FA lens,
viewfinder and on the LCD panel. See page 110 for details.
• If the built-in flash is used continuously, the battery may become warm, but
it does not mean that the battery is faulty; it's one of the battery's
characteristics.
• The shutter cannot be released until the flash is fully charged.
• To enable shutter release before the flash is charged, set custom
function number [CF7] to [2]. See pages 134 and 138.
will blink rapidly in the
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