Справочник Пользователя для ARRI 416

When lighting scenes with HMI/CID discharge lamps, the 

intensity of the light will pulse with the power supply frequency 

unless a flicker-free ballast is used. 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 normally fixed, compensation 

is achieved by adjusting the angle of the mirror shutter.

The following table indicates the mirror shutter angle that 

needs to be set:

Frame rate 

25 fps 

24 fps 

25 fps 

24 fps

 
Shutter angle 

Any angle 

172.8° 

150° 

Any angle