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FORUMS General Gear Talk Flash and Studio Lighting
Thread started 27 Jul 2008 (Sunday) 18:19
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Canon 580EXII triggering Nikon SB80DX

 
AlanU
Cream of the Crop
Joined Feb 2008
Vancouver, BC
Jul 27, 2008 18:19 |  #1

Hey all,

I've searched the net wondering how I could trigger my Nikon flashes with my 580EXII in master mode using IR.

I've discovered that it is possible. I've set my xti to 1/200, f5.0, ISO 100. With my 580EXII (E-TTL mode) set to master with the flash head disabled fired my first shot. I turned 2 of my Nikons on aswell as my 580EXII (2nd unit off camera) in SLAVE mode. Both of my SB-80DX fired but my 580EXII did not?????? It appears there is some sort of interference to prevent my Canon flash to fire. I turned both Nikon flashes "OFF" and suddenly my Canon fired.

Here are two example shots #1 is a picture of all three flashes turned on. Please note the 580EXII did not flash. #2 is a picture of my Nikon SB-80DX turned "OFF" You will see my Canon now fires. All 3 flashes are set to 1/16 in Manual.

#1

IMAGE: http://members.shaw.ca/aircooled/Nikonsb80dx.jpg

#2

IMAGE: http://members.shaw.ca/aircooled/canon580EXtwo.jpg

5Dmkiv |5Dmkiii | 80D | 24LmkII | 35mm f/2 IS | 85 mkII L | 100L | EF-S 10-22 | 16-35L mkII | 24-70 f/2.8L mkii| 70-200 f/2.8 ISL mkII| 600EX-RT x2 | 580 EX II x2 | Einstein's
Fuji X-T2 w/battery booster | 16mm f/1.4 | 56 f/1.2 | 10-24 f/4.0 | 55-200 | EF-X500

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tim
Light Bringer
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50,843 posts
Joined Nov 2004
Wellington, New Zealand
Jul 27, 2008 19:05 |  #2

ETTL preflash is probably causing any problem, just run your 580 in manual.


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DDCSD
GIVIN' GOOD KARMA
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13,313 posts
Joined Jun 2007
South Dakota
Jul 27, 2008 19:48 |  #3

Very interesting Alan, thanks for doing the legwork and pointing me towards this thread.

Odd that the 580 would not fire. Did you try moving the nikons further away from the second 580?

Also, what is the effect if you change the master channel on you hotshoe mounted 580?


Derek
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Lotto
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2,520 posts
Joined Mar 2005
Southern California
Jul 27, 2008 20:39 |  #4

I deal with situation like that all the time in my garage studio, as I use my slave 430EX as hair light.

What happens is that the slave 580 needs to see the command flash from the master unit, to be able to know when to fire and by how much power.

The master 580 will fire command flash, in ETTL or manual mode, and with it set to fire or not. The command flash fires right after the shutter open and split second before the actual flash for the final exposure.

When the 2 Nikon flashes triggered by optical slaves, they fire at the same time as the master 580's command flash. (well, when the master 580 is in ETTL mode, the preflash will trip the Nikons once, then by command flash for the second time before the 580s' real flash)

Now the slave 580 sees two sets of "preflash", one real command flash from the master 580, and the ones form the Nikons at the same time. It gets confused and refuses to fire.


5D, 24-105L, 70-200L IS, 85mm Art, Godox

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AlanU
THREAD ­ STARTER
Cream of the Crop
Joined Feb 2008
Vancouver, BC
Jul 27, 2008 20:40 |  #5

I just put my onshoe Master 580EXII and set it to Manual mode. My off shoe Canon 580EXII will NOT fire but my SB-80dx fires happilly. I covered the Nikon's front sensor with my hand and then the Canon flashed.

So regardless of Master flash head "OFF" or "ON" as long as the nikon's sensor is accepting any signal from the MASTER the off shoe Canon will not fire.

So I guess if you have a handful of nikon flashes ( I believe the sb28 have NO optical slave trigger sensor) the 580EXII will work as a Master.

With the 2 pictures above it appears the Canon is triggering the nikons perfectly.

Derek, My master is set to E-TTL, channel 1 and it fires the nikons. I tried channel 2 and it works also. I did try moving the Nikon far away from the Canon 580EXII and still no love....... turn the Nikon off and the Canon fires happily. Anything else you want me to try just chime in. I'll try to get whatever done when time permits.

I hope this helps others in alternate flash photography. I guess I'll try this outdoors and see the outcome and range.


5Dmkiv |5Dmkiii | 80D | 24LmkII | 35mm f/2 IS | 85 mkII L | 100L | EF-S 10-22 | 16-35L mkII | 24-70 f/2.8L mkii| 70-200 f/2.8 ISL mkII| 600EX-RT x2 | 580 EX II x2 | Einstein's
Fuji X-T2 w/battery booster | 16mm f/1.4 | 56 f/1.2 | 10-24 f/4.0 | 55-200 | EF-X500

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AlanU
THREAD ­ STARTER
Cream of the Crop
Joined Feb 2008
Vancouver, BC
Jul 27, 2008 20:49 as a reply to AlanU's post |  #6

Lotto, you are the man!! Good explanation.

I guess I'll just leave the 2nd canon flash in the gearbag and simply use the Nikons. You can almost buy 3 mint used sb80dx for the price of a new 430ex+taxes.

Due to the new Nkon SLR's the old nikons are incompatible so its a bonus for strobists. The SB900 flash might even drop the SB800 users to sell for reasonable prices. Truly though the SB26 and SB80dx is nice due to pc sync ports for PW, skyport, cybersyc, and speculate soon to be radio popper jr users.


5Dmkiv |5Dmkiii | 80D | 24LmkII | 35mm f/2 IS | 85 mkII L | 100L | EF-S 10-22 | 16-35L mkII | 24-70 f/2.8L mkii| 70-200 f/2.8 ISL mkII| 600EX-RT x2 | 580 EX II x2 | Einstein's
Fuji X-T2 w/battery booster | 16mm f/1.4 | 56 f/1.2 | 10-24 f/4.0 | 55-200 | EF-X500

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jwbates
Hatchling
1 post
Joined Jan 2009
Jan 06, 2009 00:09 as a reply to AlanU's post |  #7

I just ran across this problem, using a 580EX, an ST-E2, and an SB800. But I found the answer, or at least the answer that works for me:

I had been using the SB800 in SU-4 mode so that it would trigger on flash. But I also had a cheap optical slave (it was something like $20 at B&H, I think). I mounted that on the Nikon, and it automatically switched from remote to manual mode.

Bingo. Both flashes fire just fine now.

If anybody's still looking for an answer for this problem, I hope this helps.




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Canon 580EXII triggering Nikon SB80DX
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