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Occasional Contributor
Posts: 11
Registered: ‎03-08-2014

Back Button Focus vs Speedlight Auto Shutoff

I set the "star" button on my Rebel T3i to use as my back-button focus. Now that I'm discovering/experimenting with flash photography, the directions from my owners manual state "To cancel the slave unti's auto power off, press the camera's <*> button."

 

Is there an alternative? Right now, if I press this star button, I'm focusing, and I don't see this canceling the Speedlight's auto power off function. 

 

Thanks! 

VIP
Posts: 11,987
Registered: ‎08-13-2015

Re: Back Button Focus vs Speedlight Auto Shutoff


@rhodesmk wrote:

I set the "star" button on my Rebel T3i to use as my back-button focus. Now that I'm discovering/experimenting with flash photography, the directions from my owners manual state "To cancel the slave unti's auto power off, press the camera's <*> button."

 

Is there an alternative? Right now, if I press this star button, I'm focusing, and I don't see this canceling the Speedlight's auto power off function. 

 

Thanks! 


Which model of Canon flash?  Depending on the AF mode and shooting mode, you should be able to press the shutter and get the same result.

 

Do you understand the nomenclature used to describe how the buttons are programmed?  It works like this.  See the slash?  Look at how the button programming options are written.

 

[Function 1 / Function 2 ]

 

The ‘Function 1” describes what happens when you press the Shutter, while “Function 2” describes what happens when you press [*] button.  

Look at the function for the default behavior, Option 0, I think it is.  By default, the [*] button is programmed for {AE Lock}.  Your BBF programming now puts [AE Lock] on the shutter.  Either way, either the shutter or the [*] button should do what you need.

 

 

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"Doctor told me to get out and walk, so I bought a Canon."
Occasional Contributor
Posts: 11
Registered: ‎03-08-2014

Re: Back Button Focus vs Speedlight Auto Shutoff

My Speedlight model is a 430 EX II. 

 

It sounds like you are saying that since I assinged the "star" button to Back Button Focus, that now the shutter button will take over the speedlight auto shutoff function. 

 

Did I understand you correctly? 

 

I am not near my camera today, so will check this out later this week, just wanted to make sure I understood you first. 

 

Thanks, 

 

 

Respected Contributor
Posts: 1,076
Registered: ‎10-17-2012

Re: Back Button Focus vs Speedlight Auto Shutoff

Hello Rohdesmk, 

The shutter button will keep the Speedlite from auto powering off, because it's keeping the Speedlite active.  

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