The Sigma EF-500 flash – Light duration vs. output power
Apr 5, 2007
Udi Tirosh
Udi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.
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The measurements in the below table help to illustrate the amount of time that the flash is emitting light in each of its various power setting. This time is crucial when taking high speed photos.
Measurements were done with a Photo-diode, oscilloscope set to 50ohm.
| 1/1 Output power |
 |
| 1/2 Output power |  |
| 1/4 Output power |  |
| 1/8 Output power |  |
| 1/16 Output power |  |
| 1/32 Output power |  |
| 1/64 Output power |  |
| 1/128 Output power |  |
contributed by Karsten Stroemvig (aka Lullaby)
Udi Tirosh
Udi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.
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