The Sigma EF-500 flash

Light duration vs. output power

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 ^{time/division was change}
1/32 Output power
1/64 Output power
1/128 Output power