430EX III with EOS 70D

[jim_h]

Does somebody know, if is possible control external flash exposure from camera? I thought it was possible when you press SET button and rotate with ring circle, but when I press SET I can just see exposure value, but I am not able to change it from camera. It is possible only for build flash.

I updated camera firmware 2 day ago, so I want to know, if i have mistake in settings or I am wrong and this possibility is just for build flash.

I looked into the manual, but I did not find any help.

Thank you

[kvbarkley]

Is the flash attached to the camera or is it connected via optical wireless flash?

[Tim]

jim_h, 

The flash needs to be attached to the camera's hot shoe in order to access the external Speedlite menu in the camera. 

[jim_h]

Flash is attached to camera via hot shoe. There is difference in behavior when I press SET for build flash and external flash.

With build flash:

When I press SET I can see flash exposure icon in viewfinder and I can move with exposition

With external 430EX III

When I press SET I can see flash exposure icon in viewfinder, but this icon is slowly flashing and I am not able to change flash exposition.

Same situation when I press Q button and want to change this setting from quick menu.

But I can see, there is communication with external flash. For example if I change aperture or zoom, values are changing on external flash display.

[RobertTheFat]

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@jim_h wrote:

Flash is attached to camera via hot shoe. There is difference in behavior when I press SET for build flash and external flash.

With build flash:

When I press SET I can see flash exposure icon in viewfinder and I can move with exposition

With external 430EX III

When I press SET I can see flash exposure icon in viewfinder, but this icon is slowly flashing and I am not able to change flash exposition.

Same situation when I press Q button and want to change this setting from quick menu.

But I can see, there is communication with external flash. For example if I change aperture or zoom, values are changing on external flash display.

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Conceivably, something like that might happen if your external flash were set to TTL or Manual. It may have to be set to E-TTL to take its settings from the camera.

[jim_h]

This setting is also correct. E-TTL is set.

[jim_h]

I got it. Problem is, when you set some compensation on external flash. Then you are not able control this compensation from camera any more. You have to go to 0 first and then you can change value from camera.

Thanks to all for advices.

[RobertTheFat]

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@jim_h wrote:

I got it. Problem is, when you set some compensation on external flash. Then you are not able control this compensation from camera any more. You have to go to 0 first and then you can change value from camera.

Thanks to all for advices.

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Interesting factoid. Glad you were able to track it down.