Flicker-Free Filming Speeds

If your not using Danny Boy Services' Flicker Free HMI Cinepars,
these tables will be useful to determine "safe" shooting speeds
for film cameras at any shutter angle.

Warning: These frame-rates are safe under most circumstances,
but we encourage you to shoot a film test to verify results.

HMI Flicker Free Filming Speeds at ANY shutter angle

60 Hz Line Frequency
 
1.000
4.00
6.315
10.000
24.000
1.500
4.800
6.666
10.909
30.000
1.875
5.000
7.058
12.000
40.000
2.000
5.217
7.500
13.333
60.000
2.500
5.454
8.000
15.000
120.000
3.000
5.714
8.571
17.143
3.750
6.000
9.231
20.000

HMI Flicker Free Filming Speeds at ANY shutter angle

50 Hz Line Frequency
1.000
4.166
6.250
11.111
50.000
1.250
4.347
6.666
12.500
33.333
2.000
4.545
7.142
14.285
100.000
2.500
4.761
7.692
16.666
3.125
5.000
8.333
20.000
3.333
5.263
9.090
25.000
4.00
5.882
10.000
33.333

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