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Occasional Contributor
Posts: 20
Registered: ‎09-20-2017
Accepted Solution

External flash

I have a Canon EOS 80D. I also have two flashes (4300EX 3-RT) and (270EX 2). Does anyone know if there was a way I can get the two flashes to go off while I take a picture and the flash on camera would stay off.
Reputable Contributor
Posts: 691
Registered: ‎12-24-2013

Re: External flash

[ Edited ]

The 430EX III-RT and 270EX II are not compatible in Radio wireless operations. 

 

The 430EX III-RT has both radio wireless capability and optical wireless capability as a "Slave Flash", but only radio wireless capability as a "Master Flash".

 

The 270EX II has only optical wireless capability as a "Slave Flash", just as the 430EX II in the chart shown in the manual.

 

You can use your 80D built in flash as an Optical master for both flashes in optical slave mode.

 

430EX RT.jpg

Mike Sowsun
S110, SL1, 80D, 5D Mk III
Frequent Contributor
Posts: 55
Registered: ‎06-07-2013

Re: External flash

Yes, the built-in flash on the EOS 80D can function as an optical wireless transmitter to control both of the flashes you've mentioned off camera. The built-in flash can also be configured to not fire during the actual exposure as well.

Occasional Contributor
Posts: 20
Registered: ‎09-20-2017

Re: External flash

Do you know how I can configure it so the flash on my camera is off but the off camera flash will fire
Reputable Contributor
Posts: 691
Registered: ‎12-24-2013

Re: External flash

[ Edited ]

(I edited my original answer above. I thought you wanted the 430EX III -RT to be the master to the 270EX II slave)

 

 Yes, you can use the 80D built in flash to fire one or both of your external flashed using optical wireless.

 

 Under the Built in Flash settings, select Wireless func. and then select the middle icon for external flash only. The top selection is for flash ratios between the built in flash and external flash and the bottom one is for firing both the built in and external flash together. (You can also use ratios between multiple external flashes)

 

 You will still see the built in flash fire, but it is only sending the coded optical wireless flash instructions and will contribute little or no light to the scene. (if you have a very close subject or high ISO you may see a little light from the built in flash in the photo)

 

5D3_1147.JPG

5D3_1148.JPG

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5D3_1151.JPG

5D3_1152.JPG

 

 

 

 

 

Mike Sowsun
S110, SL1, 80D, 5D Mk III
Occasional Contributor
Posts: 20
Registered: ‎09-20-2017

Re: External flash

Awesome. I will try it when I get home this afternoon
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Occasional Contributor
Posts: 20
Registered: ‎09-20-2017

Re: External flash

Couldn't get it to work. Should I se the 4300 to master or slave? Just to be clear, the 4300 is gonna be off the camera and sitting on the stand by itself
Esteemed Contributor
Posts: 3,344
Registered: ‎02-17-2016

Re: External flash

The 430 should be an optical slave. What did not work?

Occasional Contributor
Posts: 20
Registered: ‎09-20-2017

Re: External flash

So I have set my camera to what Mike said. My camera is on Av and the flash on my camera is off. I just want the external flash to go off. With these setting, my 4300 won't go off
Reputable Contributor
Posts: 691
Registered: ‎12-24-2013

Re: External flash

[ Edited ]

@nav16 wrote:
So I have set my camera to what Mike said. My camera is on Av and the flash on my camera is off. I just want the external flash to go off. With these setting, my 4300 won't go off

Is the 270EX working as a Slave?  Do you have the built-in flash set like this? 

5D3_1151.JPG

 

 

Mike Sowsun
S110, SL1, 80D, 5D Mk III
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