Nikon D6 Reference Manual page 880

D
The Electronic Front-Curtain Shutter
•
Pictures taken with lenses of types other than G, E, or D may contain
"noise" such as lines or fog. Select [Disable] should you notice this to be
the case.
•
Regardless of the option selected, the camera uses the mechanical
shutter in release modes other than Q and M
•
The fastest shutter speed and maximum ISO sensitivity available with
the electronic front-curtain shutter are
respectively.
d7: Extended Shutter Speeds (M)
Extend the range of shutter speeds available in mode M; the
slowest shutter speed available when [On] is selected is 900 s
(15 minutes). Extended shutter speeds can be used for pictures
of the night sky and other long exposures.
•
To use extended shutter speeds, choose [On] and select a
shutter speed of 60 s or slower.
828 A Custom Settings: Fine-Tuning Camera Settings
UP
1
/ s and ISO 102400,
2000
G button U A Custom Settings menu
.