Film Speeds/Shutter Angles for 60HZ Power using Magnetic Ballast HMI's

Speed in fps at any Shutter Angles

120.000 60.000 40.000 30.000
24.000 20.000 17.143 15.000
13.333 12.000 10.909 10.000
9.231 8.571 8.000 7.500
7.058 6.666 6.315 6.000
5.714 5.454 5.217 5.000
4.800 3.750 3.000 2.500
2.000 1.875 1.500 1
 

Speeds at particular shutter angles

66.667 fps
200°

65.000 fps
195°
63.333 fps
190°
57.600 fps
172.8°
56.667 fps
170°
55.000 fps
165°
53.333 fps
160°
50.000 fps
150°
48.000 fps
144°
46.667 fps
140°
45.000 fps
135°
43.333 fps
130°
36.667 fps
110°
35.000fps
105°or 210°
33.333 fps
100° or 200°
26.667 fps
80° or 160°
25.000 fps
75° or 150.0°
     
       
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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