D4: Shutter Type; D5: Extended Shutter Speeds (M) - Nikon Z fc N2016 Reference Manual

d4: Shutter type

Choose the type of shutter used for photographs.
Option
O [Auto]
[Mechanical
P
shutter]
[Electronic front-
x
curtain shutter]
"Mechanical shutter"
D
[Mechanical shutter] is not available with some lenses.
The electronic front-curtain shutter
D
The fastest shutter speed available when [Electronic front-curtain shutter]
is selected is 1/2000 s.

d5: Extended shutter speeds (M)

If you select [On], you can extend the shutter speed when shooting in
mode M up to 900 seconds (15 minutes). This is useful when you want to
shoot with the shutter open for extended periods, such as for
astronomical photography.
･ To use extended shutter speeds, choose [On] and select a shutter
speed of 60 s or slower. When shooting starts, the control panel
switches to indicate that the shutter is open.
A Custom Settings: Fine-tuning camera settings
G button U A Custom Settings menu
The camera chooses the shutter type automatically
according to shutter speed. The electronic front-
curtain shutter is used to reduce blur caused by
camera shake at slow shutter speeds.
The camera uses the mechanical shutter for all
photos.
The camera uses the electronic front-curtain shutter
for all photos.
G button U A Custom Settings menu
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Description