C
a
m
e
ra O
p
e
ra
ti
o
n
85
Setting the Mirror Shutter Angle (Mode 5)
Without electronic accessories, the following shutter
angles can be set using the camera display:
11.2°, 22.5°, 30°, 45°, 60°, 75°, 90°, 105°,
120°, 135°, 144°, 150°, 172.8°, and 180°.
To set the mirror shutter angle:
Change to mode 5 by pressing the MODE button
•
four times. The display looks like mode 1 without
the mode 1 indicator bar in the top right corner.
Press the SEL button repeatedly until the
•
desired shutter angle appears in the display.
Within three seconds, confirm the selected
•
shutter angle with the SET button.
Note: If the selected shutter angle is not confirmed
within three seconds, the shutter angle
will revert to the previously set value.
Using electronic accessories such as the WRC unit,
the shutter angle can be set in 0.1° increments
in the range of 11.2 – 180°. The procedure is
described in the respective instruction manual.
Note: Mode 5 actually is Mode 7 based on the ARRI
camera display reference structure. Electronic
accessories therefore identify it as Mode 7.
Filming with HMI Light
When shooting scenes with non-electronic ballast
HMI or fluorescent lighting, the pulsing light intensity
depends on the supply frequency. To achieve constant
exposure, the camera’s frame rate, the supply frequency
of the lighting, and the angle of the mirror shutter
must all relate to each other. As the camera frame
rate and the supply frequency of the lighting are
usually given circumstances, the angle of the mirror
shutter has to be used for compensation. The table to
the right shows examples for different situations.
Supply frequency
50 Hz
60 Hz
Frame rate
25 fps
23.976/24 fps
25 fps
23.976/24 fps
Shutter angle
180°
172.8°
150°
180°
Exposure time
1/50th
1/50th
1/60th
1/48th
Always verify the results of these settings with a
test shoot!
fps
