I ordered a set of three Yongnuo RF-603 wireless remote flash triggers from eBay for $50. They also work as a remote trigger for the camera as well (each of the modules have a trigger button). They are just plain remote triggers, thus they do not support ETTL. They also do not support high-speed sync (so you cannot use exposure times under 1/200s). The modules have a socket for a 3.5mm trigger cable and a PC sync cable connector. I received one 3.5mm cable with my units. These modules are transceivers so there is no separate master or slave units, all of them work as the trigger source.
They use AAA batteries and you can configure them to use sixteen different channels with a DIP-switch in the battery compartment.
If you use one unit as a remote trigger for your camera, the other modules on the same channel still work as flash triggers which is handy.
I opened one unit to see the quality inside and the solders to the contacts on the case do not look too good:
I assume these solderings were made by hand when the units were assembled, I was unable to get the PCB off the case without de-soldering the contacts (which I didn’t want to do because I’d be worried about the contacts melting the case!) so I have no idea about which RF chip they have used.
The battery springs were also soldered straight to the board which might not be the best solution in the long term:
One annoying design feature with these units is that when you attach the module to a flash unit like 430EX, the power switch is hidden under the flash unit and you have to remove the unit from the flash to turn it off (or poke it with a screwdriver). With my Yongnuo Y-460 flash unit the power switch is a bit more accessible because the unit is thinner on the front.
- Cheap, they come under $17 a piece
- Work as a trigger source for the camera
- They feel pretty nice and sturdy
- Transceivers so you do not need a separate master unit
- 3.5mm and PC sync cable connectors
- AAA batteries (common, everyone has them)
- No high-speed sync
- No ETTL
- (Hand) solder quality is pretty crappy
- Power switch gets hidden under the flash unit
As a conclusion I think they were a good buy, nice bang for the buck.