Yongnuo RF-602 Flash Triggers
I have been using some of the Yongnuo RF-602 transmitters and receivers for a little while now, and they perform pretty well under most conditions. They operate on the 2.4Ghz band, but I have never had any interference problems, even using them on a college campus with tons of wireless devices on the same band.
RF-602 trigger and receiver
The trigger that fits on top of the camera is a pretty small thing, about the size of the new pocket wizard mini TT1, although not as nice looking. The receiver has a screw lock connection for a sync cord on the back, and a hot shoe on the top. This is great because it eliminates the need for sync chords, while still providing the option. The SB600 I use has no sync port, so the hot shoe triggers my flash. On the bottom there is a plastic hot shoe connector (cold shoe) and a tripod or light stand socket.
This was my max range test. The arrow points to the flash. It is on the other side of a practice field and down a hill.
There are plenty of reviews online stating the range to be around 200 meters or so, and I found that to be pretty accurate as long as you maintain line of sight with the flash. I decided to try a test I had not seen done before on the internet, so I placed the flash on a stand with the receiver well behind a brick and cinder block wall, next to a transformer. I figured if there was going to be loss of signal or interference, this is the kind of condition that it would occur under. My conclusion was that the range was decreased significantly, although they still had plenty of range for what I need. In real usage, they have never misfired on me. I use them often to light basketball games, and they fire every time no matter where I am in the stadium.
Flash behind the wall. Note the transformer to the right of it.
- Maximum flash distance from behind the wall. This was when misfires started to occur.
