Film Speeds/Shutter Angles for 50HZ Power using Magnetic Ballast HMI's

Speed in fps at any Shutter Angles

100.000 50.000 33.333 25.000
20.000 16.666 14.285 12.500
11.111 10.000 9.090 8.333
7.692 7.142 6.666 6.250
5.882 5.555 5.263 5.000
4.761 4.545 4.347 4.166
4.000 3.333 3.125 2.500
2.000 1.250 1.000  
 

Speeds at particular shutter angles

55.556 fps
200°

54.167 fps
195°
52.778 fps
190°
48.000 fps
172.8°
47.222 fps
170°
45.833 fps
165°
44.444 fps
160°
41.667 fps
150°
40.000 fps
144°
38.889 fps
140°
37.500 fps
135°
36.111 fps
130°
30.556 fps
110°
29.167 fps
105°
27.778 fps
100° or 200°
24.000 fps
86.4° or 172.8°
22.222 fps
80° or 116.0°
     
       
Unless you are very familiar with the techniques and equipment film tests should be performed to verify the speed shutter combination, particularly at high or low frame rates.
Wednesday, 10 March 2010
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