ARRI ARRIFLEX 235 用户手册

When lighting scenes with HMI/CID-discharge lamps, the 

pulsing light intensity is dependent 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 

normally given, compensation must be carried out 

through the angle of the mirror shutter.

The following table indicates the mirror shutter angle that 

needs to be set:

 
Supply frequency 

Frame rate 

25 fps 

24 fps 

24 fps

 
Shutter angle 

180° 

172.8° 

144°