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The Sigma EF-500 flash – Light duration vs. output power

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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
light_duration_vs_output_power_ef500-1
1/2 Output power light_duration_vs_output_power_ef500-2
1/4 Output power light_duration_vs_output_power_ef500-4
1/8 Output power light_duration_vs_output_power_ef500-8
1/16 Output power light_duration_vs_output_power_ef500-16
1/32 Output power light_duration_vs_output_power_ef500-32
1/64 Output power light_duration_vs_output_power_ef500-64
1/128 Output power light_duration_vs_output_power_ef500-128

 

contributed by Karsten Stroemvig (aka Lullaby)

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About Udi Tirosh

Udi Tirosh is an enterpounur, photography inventor, journalist and writer based in Israel. With over 25 years of experiance in the photo-video industry Udi has build and sold several photography related brands. Udi has a double degree in mass media communications and computer science.

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