YONGNUO RF-603C-II-C3 Wireless Remote Flash Trigger Kit for Canon 1D 5D 7D 10D 20D 30D 40D 50D

Work very well

Things you need to know before buying these triggers:- They do not support TTL (you will need to manually set flash power as it does not support communication with your camera's metering system)- These come with a wire that does not fit into all cameras. (They're compatible with my Canon 6D and will be with most newer cameras not using a PC input)- Each take 2 AAA batteries- They can be used a flash trigger from your camera or a wireless shutter release as wellFor starters, these triggers are a great buy at the price point. I bought a few triggers under the cowboys studios branding and they turned out to be inconsistent and flimsy. Granted, these are not the best in build quality and they do not feel like a $400 pocketwizard trigger but they definitely get the job done. They're small enough to fit into a small pocket on the side of my camera bag and are a handy tool for a photographer on a budget. From my experience with them they have been consistent and fire on command in both the flash trigger and shutter release modes.Now for the negative aspects... There is no TTL but for the price, I really couldn't complain as using manual flash allows for more control. The locking mechanism is a plastic piece which screws down onto the camera's hot-shoe or flash mount which is sturdy enough to hold onto the camera but doesn't provide the most security. Lastly, the lack of ability to select channels which again is something you can't complain about for the price point.Addition: I'd recommend using the Yongnuo YN560-III-USA Speedlite Flash with these triggers as they have a built in receiver and are great back-up or slave flashes

I wanted to try those remotes to replace my Pocket Wizard for Canon. To my surprise i found them to be well built and relatively reliable with fewer misfires. No frills here so dont expect anything auto or ettl or hss. Works for me for most indoor shooting situations. Very annoyingly they go asleep after about 1 min. I don't know if its possible to disable this. Overall decent value for your money though.

I bought these to replace the long sync cable I was using to trigger my vintage studio strobes. At this point I'm using the Yongnuo units just for that purpose, and these transceivers worked perfectly out of the box. The fact I can also use them to remotely control my camera from 100 meters away is a bonus. The manual was very poorly translated from Chinese, but these are simple enough to figure out, and there's plenty out there on the Internet to answer any questions. Also, note that there is an older version of this Yongnuo wireless flash trigger. On this date in September 2016, the current version is designated with the Roman numeral II. Make sure you get the current version.There are two families of Yongnuo's RF-603II triggers. For Canon the family members are RF-603II C1 and RF-603II C3. For Nikon the family members are RF-603II N1, RF-603II N2, and RF-603II N3. The numbers following "C" or "N" refer to the type of shutter cable that comes with a pair of triggers. The shutter cable is used when you want to use the RF-603II to remotely fire your camera's shutter, either wirelessly or via a direct, wired connection. One end of the cable has a 2.5mm plug that you insert into an RF-603II trigger. The other end of the cable is camera-specific, and connects to the camera's remote-control terminal. The manual gives these representative camera models for the C- and N-numbered shutter cables:• C1: Canon 60D, 350D, 450D, 500D, 550D, 600D, 650D, 700D Pentax Series• C3: Canon 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D• N1: Nikon D1, D2, D3, D4 Series, D200, D300, D700, D800• N2: Nikon D70, D70S, D80• N3: Nikon D90, D600, D3000, D5000 Series, D7000 SeriesTo use a pair of triggers to wirelessly fire your shutter: Put one of the RF-603II triggers in your hot shoe. Set the power button to TRX. Connect the 2.5mm plug of the short cable to the RF-603II trigger and the other end to your camera's remote-control terminal. Use the other RF-603II trigger to remotely fire your shutter--from up to 100 meters away, the manual claims.

These things aren't packed full of features but they do their job for sure. At only $30/pair, and using common AAA batteries, it's hard to beat the value for dollar you're getting. They are dual purpose so can either receive or send a signal, if you want to switch which is which it's easily done with the slider on the side. I'm not sure how many are supported, but I bought 2 pairs, using one as a transmitter and 3 as receivers and they work great.They can also be set up with an included cable to trigger the shutter on your camera. It works fine without a flash. With a flash it's a little tricky - the issue is that when holding a flash + transmitter in your hand, and having the receiver on top of your camera to trigger the shutter, the flash will go off as soon as you press it and about 0.5s before the camera shutter triggers and miss it. Instead, you need to have a third device, use that one to trigger both the flash and camera simultaneously.