Nikon D6 Reference Manual page 351

A
Recording Movies in Mode M
In mode M shutter speed can be set to values between
(the slowest available shutter speed varies with the frame rate).
A
Wireless Remote Controllers and Remote Cords
If [Record movies] is selected for Custom Setting g2 [Custom controls] >
[Shutter-release button], the shutter-release buttons on optional
wireless remote controllers and remote cords can be pressed halfway to
start live view or pressed all the way down to start and end movie
recording.
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Using an External Microphone
Optional ME-1 stereo microphones or ME-W1 wireless microphones can
be used to record movie audio.
Points to Note When Recording Movies
1 1
/ s and / s
25 8000
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