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Esteemed Contributor
Posts: 3,466
Registered: ‎02-17-2016

Re: speedlight setup for 7d and other settings

If you really want a shutter speed faster than the flash sync speed, you need to use High Speed Sync, but it will cut down on the flash power so you might not get the range you need which is probably iffy now anyway.

 

New Contributor
Posts: 2
Registered: ‎10-31-2019

Re: What is the difference in the Canon 550 Flash between the power setting 1-128 and the Flash comp

 

What is the difference in the  1-128 power setting in the Canon 550 EX and the Flash Compesation setting.

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Esteemed Contributor
Posts: 3,466
Registered: ‎02-17-2016

Re: What is the difference in the Canon 550 Flash between the power setting 1-128 and the Flash comp

You really need to get Syl Arena's Speediliters handbook, but it is currently out of print and outrageously expensive.

 

To answer your question, the 128 levels are for manual shooting, and the flash compensation is for E-TTL to balance flash and ambient light.

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