Flash duration, Sync Speed and Global Shutter - The TRUTH

Flash Duration, Sync Speed, Global & Leaf Shutters, High Speed Sync and more - what does the Sony a9iii mean for flash photography? Let's break it down!

I have seen some great videos discussing this topic, especially relating to the A9iii, but none that give the FULL Picture regarding flash duration and flash output at these incredible shutter speeds. Let's set the record straight!

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FLASHES TESTED
Godox V1: https://geni.us/godoxV1
Godox AD200: https://geni.us/ad200
Profoto A10: https://geni.us/profotoA10
Profoto A2: https://geni.us/profotoA2
Profoto B10X: https://geni.us/B10x
Westcott FJ80II: https://geni.us/fj80ii
Westcott FJ200: https://geni.us/FJ200
Westcott FJ400: https://geni.us/fj400

Hasselblad X2D 100C: https://geni.us/X2d100c
Sony A9iii: https://geni.us/a9iii

VIDEOS SHOWN
Slow motion shutters from SloMoGreg: https://www.youtube.com/watch?v=mK0dGAu5APA
Global Shutter animation from Sony Camera: https://www.youtube.com/watch?v=nw8dSFwPJdI

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TIMELINE
00:00 Welcome
00:45 Methodology
01:30 Flash Duration
05:35 T5 and T1 Ratings
08:38 I AM HELIOS!
09:10 Shutter Types
09:59 What is SYNC SPEED?
12:16 Leaf Shutter Sync Speed
12:55 Global Shutter
14:11 1/80,000th Sync Speed
14:25 Fastest Flash Option?
16:18 Reality Check
17:18 HIGH SPEED SYNC
19:25 Flash Test Results
24:18 Conclusion