The Yongnuo YN-E3-RT II Wireless Transmitter Canonfrom Yongnuo YN-E3-RT II Wireless Transmitter Canonis a 16 channel, 5 group wireless triggering device with a 328' range. The transmitter offers E-TTL II/E-TTL autoflash, manual flash, stroboscopic flash, auto external flash metering modes as well as 1:8 flash ratio control.

Convenience features include flash exposure lock, AF beam focus assist, modeling strobe and 9 custom functions. The YN-E3-RT II transmitter will run for 10 hours of continuous use on AA/LR6 alkaline batteries. A power saving function shuts the unit down after being idle for 5 minutes to conserve batteries. The YN-E3-RT II also supports firmware updates to make it future-proof.

E-TTL II, E-TTL Compatible    15 Channels, 5 Groups, Range: 328'    Supports USB Firmware Updates    Frequency: 2405-2475 MHz    AF Assist Beam    Flash Ratio Control    Remote Control from 1/1 to 1/128 Power    Runs on Two AA Batteries

Related Questions and Answers

Q: 1. Would this work with a canon 430ex rtiii speedlite?

A: Yes this transmitter is compatible with the Canon 430EX III RT.

Q: 2. Does anyone use this successfully with Canon Speedlite 600EX II-RT?

A: I own these and they work well with a Canon 600 EXII-RT. The focus assist is a nice bonus.

Q: 3. What is the difference between this unit and Canon’s ST-E3-Rt for $285? Is there any functionality lacking?

A: The YN-E3-RT II would have similar functions to the Canon ST-E3-RT but at a lower price point.

Q: 4. Can you turn off the AF focus assist beam or does it always go on in low light conditions?

A: Yes, under the custom settings you can turn it off. C.Fn-08: （AF-assist beam firing） 0: ON (Enabled) 1: OFF(Disabled)The AF-assist beam is not fired from the speedlite transmitter

Q: 5. Can you operate two transmitters powered on at the same time on different bodies?

A: Yes, but if you will need to consider recycle time if you are using them both at the same time.

Q: 6. Hello, whether this transmitter works with yongnuo yn 685 flash?

A: No only with the Youngnuo 600 series flashes.

Q: 7. Does anyone use this successfully with the Canon 5D Mark IV? I have the original version and it is very buggy with the 5D IV. Can anyone chime in about using this with the 5D Mark IV? Thanks!

A: It works very good with Canon 5D IV

Q: 8. I'm looking to get a couple of small flashes like the Canon 270 EX II or equivalent for outdoor macro work, the flashes will be mounted on the bottom of the camera with a bracket. Will this item work for this?

A: This would not be suitable for the Canon 270 EX II. For the 270 EXII you would need a TTL cord.

Q: 9. HSS. ?? will this unit do ?

A: This unit can do HSS depending on the camera its used with up to 1/800th.

Q: 10. Does the unit tilt or does it only lay flat?

A: The transmitter is in a fixed position.