Nikon D800 User Manual (en)

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The Built-in Flash
Use with lenses with focal lengths of 24–300 mm in FX format (
Remove lens hoods to prevent shadows. The flash has a minimum 
range of 0.6 m (2 ft) and can not be used in the macro range of macro 
zoom lenses. 
i-TTL flash control is available at ISO sensitivities between 100 and 6400; 
at other sensitivities, the desired results may not be achieved at some 
ranges or aperture values.
If the flash fires in continuous release mode (
0 103), only one 
photograph will be taken each time the shutter-release button is 
pressed.
The shutter release may be briefly disabled to protect the flash after it 
has been used for several consecutive shots. The flash can be used 
again after a short pause.
A
See Also
See page 190 for information on locking flash value (FV) for a metered 
subject before recomposing a photograph.
For information on auto FP high-speed sync and choosing a flash sync 
speed, see Custom Setting e1 (Flash sync speed
0 299). For 
information on choosing the slowest shutter speed available when 
using the flash, see Custom Setting e2 (Flash shutter speed
For information on flash control and using the built-in flash in 
commander mode, see Custom Setting e3 (Flash cntrl for built-in 
flash
See page 380 for information on using optional flash units.