Canon Community Canon Community
 


Reply
Super Contributor
Posts: 223
Registered: ‎05-19-2016

What is the flash duration of Canon 600 EX II

Hello:

 

I enjoy shooting high speed photography and am happy with my 580 EX II speedlites.

I am wanting to purchase one of two more, but am curious to know if anyone has the flash durations of the 580 Ex II vs 600 EX II?

I realize not all 1/64th and 1/128th seconds are the same, etc..etc....

Or am I really over thinking this....

Thank you.....

Esteemed Contributor
Posts: 2,892
Registered: ‎02-17-2016

Re: What is the flash duration of Canon 600 EX II

Highlighted
Reputable Contributor
Posts: 607
Registered: ‎12-24-2013

Re: What is the flash duration of Canon 600 EX II

[ Edited ]

 

 

The 580EX II and 600EX should be very close in flash duration.

 

 

Keep in mind that when comparing flash duration, there are 2 different flash duration time definitions in use. One is called t 0.5 and the other is t 0.1 

 

Clipboard01.jpg

 

 

t 0.5 is the time between the moment where the flash intensity curve starts to exceed 50% of the maximum intensity point and the moment where the falling intensity curve goes underneath the 50% maximum level again.

 

The t 0.5 time is about 3 times shorter by definition and therefore used by most speedlite manufacturers, (e.g. Nikon and Canon) to exaggerate short flash duration. 

 

Page 133 of the Canon 600EX Manual shows the t 0.5 duration times.

6DAF83B0-62A3-4942-8019-9496E0E329A0.jpeg

 

 The 580EX II Manual only lists a 1/1 power t0.5 time duration of 1.2ms and that equals about 1/833 sec.

 

Since 580EXII and 600EX have the same Guide Numbers at identical zoom levels, I would expect them to have similar flash durations at comparable power settings.

 

This blog... 

Flash Duration Analysis   uses t0.1 times and has some test numbers that show some difference between the 580EXII and 600EX. The differences may be due to variations in individual flash units, or the testing methods, and I have seen other values quoted by other testers.

 

 

These tests below were were all done using t0.1 times..........

 

8E3EDDE3-5E1E-486D-A37D-75F74A68B3DB.jpeg

 6E9FE5A4-E325-434B-9DC2-9D24225A6151.jpeg

 

 

 

Actual Measured Flash Durations of Small Speedlight StrobesCF4BA31F-F19E-441B-9951-22B70D43A047.jpeg

 

 

 

 

speedlights.net 580EX II Flash Review

39F92670-2ED8-4359-A063-5DE75B4C2343.jpeg

Mike Sowsun
S110, SL1, 80D, 5D Mk III
powered by Lithium

LIKE US on Facebook FOLLOW US on Twitter WATCH US on YouTube CONNECT WITH US on Linkedin WATCH US on Vimeo FOLLOW US on Instagram SHOP CANON at the Canon Online Store
© Canon U.S.A., Inc.   |    Terms of Use   |    Privacy Statement