So I just got my Yongnuo RF-603 triggers. They're not bad for the price but I realized a couple things now that I own it that I didn't realize before hand. I think I still would of gotten it but it does show that it designed to be used a specific way and has some freedom limitations. Anyways, the first thing is it took me forever to get it working. I put batteries in both triggers but when I would push the button it wouldn't send a signal to the other trigger. I tried different channels and batteries thinking those were the issue. I finally put the trigger on top of the camera and suddenly everything worked. I googled around and discovered this is a limitation of this model is that the transmitter has to be on the hot shoe on a Canon camera to work. The main thing that stinks about this is it means I can't use an ettl flash on the hotshoe at the same time I'm using this trigger
I tested to see if the ETTL passed through but it doesn't (not that I'd really to do that since there's no locking base on the triggers). The PC port is an output only so you can't send a signal to the trigger through a camera's PC Sync port. There's stuff online about putting in a resistor inside the unit to trick into being a transmitter always. I don't completely understand what they're doing but my question is couldn't this be done outside the unit as well? So have like a hot shoe that you put the trigger on that has that resistor built into the stand? Then you could just remove the stand when you didn't want it to be transmitter and then you could put a pc sync input on it as well so you could activate the trigger from the pc sync out port.
Another limitation I found and this is more specific to my setup. But I would like to have a setup where when I take a picture with my primary camera, the secondary camera takes a picture as well. I can make this work if I plug the remote shutter release into both cameras and their respective trigger but if I use the cameras built in button to take a picture then the other camera won't take a picture which means I have a very awkward setup to have to use the button built into the trigger since once again the 2.5mm output for remote release is output only not input. I brought this up in another thread and thought I'd bring it up here as well that I'm wondering what would prevent you from using the PC sync port to trigger the other camera to take a picture. I did some testing and the voltage the trigger is sending out is maybe a volt if that if my meter is working correctly. The camera itself is sending a higher voltage than that for the remote release trigger so I don't why that wouldn't work but then again I'm little eerie of trying it out with off chance it would take out a circuit board in the camera. The safest option would be to use a relay or something similar that upon getting the input voltage it completes the remote release circuit. By doing this, whenever I take a picture with the main camera it will send a signal to the second camera to take a picture as well which is what I want.
Any thoughts anybody?