Nikon D6 Reference Manual page 379

•
Multiple exposures may be affected by "noise" in the form of randomly-
spaced bright pixels, fog, or lines.
•
In C and C modes and during silent burst photography in mode Q, the
L H
camera will take pictures while the shutter-release button is pressed
and record a multiple exposure once the selected number shots has
been taken. If [On (single photo)] is selected for multiple exposure
mode, multiple exposure mode will end once a multiple exposure has
been recorded. If [On (series)] is selected, the camera will continue to
record multiple exposures while the shutter-release button is pressed.
•
In self-timer mode ( 0 209), the interval between each shot in the
exposure is selected using Custom Setting c3 [Self-timer] > [Interval
between shots]. Regardless of the value selected for the c3 [Number of
shots] option, shooting will however end after the number of shots
selected for the multiple exposure.
•
Shooting settings and photo info for multiple exposure photographs
are those for the first exposure.
•
Do not remove or replace the memory card while a multiple exposure is
in progress.
•
Memory cards cannot be formatted while a multiple exposure is in
progress. Some menu items will be grayed out and unavailable.
Combining Multiple Exposures in a Single Photo (Multiple Exposure)
327