Can YN-622C-TX trigger Canon 580EXII directly?

Sorry if this seems a daft question, but I could have sworn I read somewhere that the Yongnuo TX could trigger the Canon 58) EXII (or any any EXII series) directly, ei: without the need for a 622 attached to the flash.

Now I can not seem to find mention of this. Did I misread somewhere?

If this is not possible, then why is there an IR port on the 622s? If not to trigger flash, what purpose does that serve?

CyberDyne (Feeling like a Noob!) Systems

CyberDyneSystems wrote in post #17787497
Sorry if this seems a daft question, but I could have sworn I read somewhere that the Yongnuo TX could trigger the Canon 58) EXII (or any any EXII series) directly, ei: without the need for a 622 attached to the flash.

Now I can not seem to find mention of this. Did I misread somewhere?

If this is not possible, then why is there an IR port on the 622s? If not to trigger flash, what purpose does that serve?

CyberDyne (Feeling like a Noob!) Systems

I believe you need a 622c hooked up to the Canon 580 for the 622TX to control it.

CyberDyneSystems wrote in post #17787497
Sorry if this seems a daft question, but I could have sworn I read somewhere that the Yongnuo TX could trigger the Canon 58) EXII (or any any EXII series) directly, ei: without the need for a 622 attached to the flash. Now I can not seem to find mention of this. Did I misread somewhere?

You may well have read it, before it was appropriately deleted. The first flash to have a built-in 622 protocol receiver built in is the recently-released YN685 speedlite.

Well, the LED on the end emits a near-IR light for pre-focus, without being too distracting. The 622 system has no connection with light pulse communications (Canon Wireless).

Knowing a lot about almost nothing!

Thank you, that makes sense. I forgot the IR was not what triggered Canon flash that it was pulses. "duh"