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Enabling/Disabling the Mirror Shutter (Mode 4)
Disabling the mirror shutter parks it, so the sensor
is exposed at all times. This effectively extends
the exposure time for each frame (see table to
the right), but disables the optical viewfinder.
To enable or disable the mirror shutter:
Change from mode 1 to mode 4 by pressing
•
the MODE button three times.
Press the SEL button three times to access
•
the mirror shutter enable/disable setting.
Within three seconds, press the SET button
•
to enable (bar in top position) or disable (bar
in bottom position) the mirror shutter.
Note: The resulting exposure time does not double, as
the sensor needs to be reset after readout.
Note: At speeds above 29.97 fps, the sensor readout
switches from 2880 x 2160 to 2880 x 1620.
As a readout of less pixels takes less time, this
switch causes a step in the corresponding shutter
angle as can be seen in the table to the right.
Note: When the mirror shutter is enabled, it controls the
sensor's exposure while the electronic shutter is
synchronized for readout in the dark phase. When
the mirror shutter is disabled, only the electronic
shutter controls the way the sensor is exposed,
which causes different motion representation.
fps
Exposure
time [ms]
at 180°
Approx.
exposure time [ms]
shutter disabled
Approx.
corresponding
shutter angle
1
500
990
356
5
100
190
342
10
50
90
324
15
33
57
306
20
25
40
288
23.976/24
21
32
274
25
20
30
270
29.97/30
17
26
284
35
14
22
272
40
13
18
259
45
11
15
247
48
10
14
239
50
10
13
234
55
9
11
221
59.94/60
8
10
209
