Canon Speedlite 600EX II-RT

The 600EX II-RT works great on its own. However, I have 4. As a wedding photographer, I need my on-camera and remote flashes to reliable function in a different building every weekend. The built-in wireless triggers are unreliable. Depending on the building, the connection between the on-camera flash and the remote flashes will drop every few minutes. The only way to reconnect is turn each remote flash off and on again. This is a completely unacceptable level of reliability for the price and totally unworkable in a professional event setting. I'll be selling mine.

Flash is awesome has plenty of power and recovery time is excellent. High sync works well.

My best light investment and a good combination with my EOS 5D mark IV. Easy to use and manipulate.

I bought 3 of these Speedlites along with the ST-E3-RT Transmitter. It's a great setup with plenty of power. The menu and display is easy to use with a day or two of using them. I used the radio link in a large room and they worked great. The only issue I found is my home Google WIFI extenders interfere with the signal. The "Link" drops after a few minutes no matter what channel I put the Speedlites on including the Auto setting. I don't think this is really an issue with the Speedlite, but it's something to be aware of if you set up in a place with devices searching for a 2.4ghz band. The Speedlites also have an optical option to fire as a backup.

Integrates well with the camera but is heavier and bigger than the Speedlite 580EXII it is replacing. Features about the same and way more expensive.

All around a great flash!! Puts out really clean and even light, easy to use, and pretty light weight. I’d highly recommend!

I can’t carry the Speedlight Instruction manual with me in the field, but I do carry an iPad: think it would be easy to download the manual in PDF form onto my iPad — but it doesn’t exist! Same applies to the ST-E3-RT Speedlite Transmitter. Complex gear like this deserves — requires — a PDF manual so that we can troubleshoot problems or figure out how to take full advantage of the Speedlight systems’ complexity in the field. Unfortunately, we don’t get one.

I love this Speedlight. This is a replacement for the 430EX-III RT. Every single feature is a most in a speedlight. The flash is much bigger than the 430EX-III RT, but who cares, there's always room for it. My advice, don't ever leave it behind and try to find a place for it in your photography bag. Speedlights have always plaid a good part in my photography, because light and focus are for me the two most important things in photography. Canon you did a good job on this.

Bought this speedlite a few weeks ago I found it to be easy to use. Definitely a big step-up from the 430ex ii in terms of the amount of light that comes out of this speedlite, I am very pleased with it!

I bought this flash two or three weeks ago and I try to learn and use it. This flash is very good and can support me

Just learning all it’s function But so far light years away from my 430X

This a great feature filled Flash. Leave it in ETTL and it is precise. Manual mode gives you full control. Just a great flash. Need to add 2 more.

Wireless feature are bit weird, but the flash is so awesome!

I have been using my Speedlite 600EX II-RT for well over 2 years and I love it. At first, I kept it on manual and was delighted with the flexibility of the swivel head and the adjustable output. These days I use more TTL and the results are pristine. I use it in studio and out, paired with two monolights vis-a-vis strobie transmitters and receivers and on the road with a Rogue Flashbender or a Lastolite portable softbox.