MarkintheHV Loc: Hudson Valley

I am trying to get my 600ex-rt flash to fire as a slave (from internal flash) using radio (not optical as the flash will be in front of the camera) from the 7d mk ii. So far, I have been unsuccessful, and was wondering if anyone else has accomplished this?

Thanks

RichardSM Loc: Back in Texas

Hi Mark
A simple question have you looked into the operating booklet on using flash photography? If it's anything like the 7D ver 1 you will need the radio trigger that Canon provides as and option to fire the 600ex-rt!

Anvil Loc: Loveland, CO

The optical system is the one that is built into the camera. To use wireless radio, you will need a transmitter mounted on the camera. Canon's ST-E3-RT Speedlite Transmitter will do this, and it will communicate with the 600EX-RT, using the built-in receiver in that Speedlite. The problem is that the Canon transmitter is pretty expensive. You can get a Yongnuo package that contains a transmitter, along with two transceivers, allowing you to control two external flashes. This Yongnuo package costs less than the Canon transmitter. It will not use the receiver capability built into the 600, which is why you need the transceiver mounted on the 600.

You can actually get away with using two transceivers, without the Yongnuo master controller. They are, after all, transceivers, not merely receivers. With one external flash, this is probably the way to go.

There is another way. You can find long, TTL cables that will connect your flash to the camera. Before I went with the Yongnuo solution, I used a 10 meter TTL cable, or a 2 meter, coiled cable.

You also may be able to do this completely optically, with the built-in flash acting as the master. The 600's head swivels quite a bit. I often found it was easy to get the red sensor to point to the camera, while pointing the flash's head to the target. That red sensor does not necessarily have to point directly to the camera.

MarkintheHV Loc: Hudson Valley

I am working through the manuals for the second time :( I guess I am off to amazon to buy a cable. I was kind of hoping I could get the radio to work.

Thanks guys

Anvil Loc: Loveland, CO

This is where I got my 10m cable. http://ocfgear.com/ocf-gear-32c-smart-cord-for-canon-ettl/

That is the 10m cable. There is also a 5m cable, which is currently out of stock.

davidrb Loc: Half way there on the 45th Parallel

According to the manual for your camera it is capable of being the master for wireless flash photography. You can still use your flash units in an optical manner by turning the flash head 180 degrees. In other words reverse the head so the body is facing the camera. When you have the flash's body facing the camera the system should work properly. The camera and flash communicate via line-of-sight optics. My 600's are used in this fashion frequently so I know it is possible. The ST-E3-RT that was recommended would allow you to use the flash at greater range and "around corners" via radio transmission. It offers much more versatility for the flash but is not required to do what you want. GL

MarkintheHV Loc: Hudson Valley

I see options in the cameras flash menu for radio, radio channel seletion, and when matched up with the identical radio channel, no sync.

Anvil Loc: Loveland, CO

The options are there, in the event you have a radio transmitter mounted to the camera. The 600EX-RT can act as a master, but only if it is mounted to the camera (or with a TTL cord). The other alternative is the Canon ST-E3-RT. Your camera does not have built-in radio transmission.

MarkintheHV Loc: Hudson Valley

Thanks for explaining this to me!

GoofyNewfie Loc: Kansas City

The soon to be released Canon 430EX III-RT will cost only a little more than the ST-E3-RT transmitter.
It works as a radio transmitter as well and looks like a nice compact flash.

robertjerl Loc: Corona, California

Canon's tranmitter is about $260.
Yongnuo's is about $88 and designed to be fully integrated with the Canon 600 system.
You can get a Yongnuo clone of the Canon 600 and transmitter for $224, less than the Canon transmitter alone. Then you can do two flashes off camera or one on camera, one off.
One dealer has 2 Yongnuo 600s and the transmitter for $305.
Actually with one of the Yongnuo flashes mounted on the camera you don't need the transmitter as the Yongnuo is a master/slave combo unit. You would only need the transmitter if you don't want to use on camera flash.

hcmcdole

:thumbup: :thumbup: :thumbup:

MarkintheHV Loc: Hudson Valley

Thanks, I actually have a Yongnuo in my case that I dont use anymore because I got the Canon.

robertjerl Loc: Corona, California

Is it the YN600? That is the one designed to mesh with the Canon EX600.

MarkintheHV Loc: Hudson Valley

No, its the 568exii