Nikon D800 User Manual (en)

Buffer Size
The approximate number of images that can 
be stored in the memory buffer at current 
settings is shown in the exposure-count 
displays in the viewfinder and control panel 
while the shutter-release button is pressed 
The illustration at right shows the 
display when space remains in the buffer for 
about 37 pictures.
The Memory Buffer
The camera is equipped with a memory buffer for temporary storage, 
allowing shooting to continue while photographs are being saved to 
the memory card.
Up to 100 photographs can be taken in succession; 
note, however, that frame rate will drop when the buffer is full (t00).
While photographs are being recorded to the memory card, the access 
lamp will light.
Depending on shooting conditions and memory card 
performance, recording may take from a few seconds to a few minutes.
Do not remove the memory card or remove or disconnect the power source 
until the access lamp has gone out
If the camera is switched off while 
data remain in the buffer, the power will not turn off until all images in 
the buffer have been recorded.
If the battery is exhausted while images 
remain in the buffer, the shutter release will be disabled and the images 
transferred to the memory card.
See Also
For information on choosing the maximum number of photographs 
that can be taken in a single burst, see Custom Setting d3 (Max. 
continuous release
For information on the number of 
pictures that can be taken in a single burst, see page 436.