Nikon Nikon 1 AW1 Reference Manual (en)

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Using the Built-in Flash
The built-in flash can not be used with live image control (
will not fire during continuous shooting at frame advance rates faster
than 5 fps (
0 87) or when On is selected for HDR in the shooting menu
(
0 46).  If the flash is fired multiple times in quick succession, the flash
and shutter may be temporarily disabled to protect the flash.  Shooting
can be resumed after a brief pause.
Objects close to the camera may be overexposed in photographs taken
with the flash at high ISO sensitivities. Note that the product is not
shockproof (
0 xiv) when the flash is raised.
To avoid vignetting, remove lens hoods. Even without a lens hood,
some lenses may cause vignetting or obstruct the red-eye reduction
lamp, interfering with red-eye reduction.  The following illustrations
show the effect of vignetting caused by shadows cast by the lens when
the built-in flash is used.
Shadow
Shadow
After using the built-in flash in dusty or sandy
locations, remove any foreign matter from
inside the flash compartment using a blower
(or, if this fails, using the technique described
on page 60) before lowering the flash. Failure
to observe this precaution could damage the
flash.
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See Also
See page 173 for information on adjusting flash level.
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Aperture, Sensitivity, and Flash Range
Flash range varies with sensitivity (ISO equivalency) and aperture. With
the standard zoom lens at maximum aperture and ISO sensitivity set to
ISO 160 to 6400, the range is approximately 0.6 m–7.0 m (2 ft–23 ft)
when the lens is zoomed all the way out, 0.6 m–4.2 m (2 ft–13.8 ft) at
maximum zoom.