The Other YN-622C User Guide v.4.09
11/12/2014 Page 3 of 64
PREFACE
Update – July, 2014
YongNuo released the YN-622C-TX on 28 June 2014. This unit provides a more convenient
control interface, and a better Groups mode than the 622C’s Mix Mode. The YN622C-TX is a self-
contained controller for the YN622C receivers. It removes the need to use the camera’s External
Flash menus for most functions.
Version 4 of TOYUG represents a complete re-organisation, and in many parts a re-write of earlier
versions.
In the 21 months since its first release, the YN-622C has shown good reliability and great
versatility. There have been firmware and hardware updates to improve performance and
compatibility, and to add extensions. My original conclusion still stands.
When YongNuo Photographic released the YN-622C in 2012, it seems that they had more in mind
than just the one transceiver (radio in and out) unit. The possibilities have been further expanded
by subsequent developments seen in Canon’s “RT” technologies, as seen in the 5DIII camera and
600EX-RT flash. The YN-622C-TX makes use of some of these features.
Just announced is a studio flash (monobloc) with E-TTL capabilities via a built-in hot-foot for
connecting a YN-622C remote. Rated at 300WS, It will integrate fully with the YN-622C system. It
even has a port for firmware updates by the user! Power supply requirements presently exclude
USA, Canada and Japan: 182-265v AC, 50Hz.
Also, YongNuo have added the ability of the new C-TX to receive commands from the YN-560-TX
(dedicated controller for the Manual-only YN-560-III flash). The C-TX will then use a “Proxy mode”
to forward the commands from the 560-TX to remote 622Cs with mounted Manual or E-TTL
flashes.
Part I of this Guide provides the core facts about the original YN622C transceiver and the YN622C-
TX Controller, as confirmed by independent testing where possible. Putting them to use is
described in Parts II and III. The final Useful Stuff section contains additional helpful information.
Footnote – December, 2014
The world moves on, but the time comes when we do not: I do not have access to cameras from
2012, with their newer protocols, so this guide is becoming dated. My thanks to all the competent
and fluent forum contributors, past and future!
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