Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Does this work for a 5D mk3 as well?
Document: I have used it on photo shoots where there is less movement and they have worked perfectly. But for weddings it doesn't seem to function as well..... unless I tape it to my 5D Mark 2.
I was really hoping to like these units ... the quality of these triggers is good .... but .... since there is no locking mechanism, these units don't stay tight enough on my Canon 5D III and Canon 7D hot shoe mounts and cold shoes as well and I had to return them for a refund ... sorry! !
The one caveat is, let's see if I can explain this correctly... I want to take a photo from camera1, and have that trigger one or more flashes and also trigger camera2 to take a photo at the same time. That doesn't work in my initial tests. I tried to trigger my 5DmkII (camera2), and that works in itself. I then hooked up one of the triggers to my G12 (camera1), and as soon as I do that, the 5D trigger stops operating.
Great price and performance for flash photography using a wireless setup. Using with my Canon EOS 5D MKIII.... great results. Fast shipment and good quality.
Can anyone verify that the RF603's, are compatible with the Canon 5D MK III, and the Yongnuo YN560 III?I was uanble to get the YN560 III, which has the built in receiver, to fire, no matter what I tried.
I bought 4 of them. Use with my Canon 5D Mark III. One of them is on my camera, the other 3 on speed-lights. Have some limitations, like: no HSS, on/off switch is covered by a speedlight (have to remove the light to turn it on/off), have to adjust each light manually as my camera does not read them. The main advantage is ability to use them in radio mode.
They work, they have the issue of having an un-accesible ON/OFF button when mounted, but it does the job very well x the price
The units were very reasonably priced and work pretty well. The sink cord broke within a month of starting to us it, though
I use this regularly for work and it misfires quite often. It doesn't have a lock so if you attach a speedlite on top it doesnt sit well.
transceivers work pretty well. I have had a few problems at bar's using these and with my hammerhead flash not firing. But for studio lights/remote, works well.
Answer: That's a really dope camera, and yes