Yongnuo YN-622C User's Guide download pdf (Page 4)

The Other YN-622C User Guide v.4.07

23/07/2014 Page 4 of 62

Original - August, 2012

(Slightly edited to remove out-dated material)

What we know gets in the way of what we could know.

I have used Canon’s External Flash menus for 5 years, appreciating being able to control remote

flashes from the camera. Well, sort of. Canon has been using an optical pulse “wireless” command

system for off-camera flashes, which works within a limited set of conditions.

Pixel released their King triggers to remove this limit, but their development was truncated.

However, kudos to Pixel for pioneering this category of trigger/controller.

Now we have the Yongnuo YN-622C which seems to fulfil the promise of a full implementation of

Canon flash technologies over a radio link. It seems that Yongnuo has not only achieved this

objective, but has added a wide range of triggering and photographer-friendly capabilities.

The YN-622C is a transceiver type radio device designed to go between a camera and one or

more off-camera flashes, to provide:

• E-TTL, FEC & HSS off-camera triggering

• Radio control of off-camera flashes from camera’s External Flash menus

• General-purpose triggering

The YN-622C is a tool for both automatic E-TTL flash exposure and Manual power levels. Each

method has its place, and photographers who understand the technologies can get predictable

results.

One part of Canon’s E-TTL is often misunderstood – Ratios. It is more than setting an FEC or EV

adjustment on two flash groups. That still leaves distance, height, angle, relative powers, uneven

ambient etc that can make a substantial difference. Canon’s ratio evaluates the actual contribution

to the image of each group of flashes, and sets the level accordingly. It is much more accurate

than the EV method. The YN-622C implements the genuine Canon technology in the camera.

Drawbacks:

• The YN-622C does not provide for firmware updates by the user.

• Canon Wireless Master/Slave is not available, being replaced by the 622C procedures.

• The transceiver buttons are hard to find by touch, and are sensitive to accidental changes.

• Canon’s original External Flash menus are inconvenient and access is slow.

• Only flashes in group C can be disabled remotely (Canon problem).

• Cannot by itself act as a shutter release.

It is not a significant list.

An examination of the case and internal components reveals a high-quality assembly. The case

appears firm. I anticipate a good life expectancy.

Because the YN-622C is designed primarily to implement Canon technologies, a thorough

knowledge of both camera and flash manuals is helpful. Each camera model has its own

variations.

My verdict: versatile, complex, well-made, suitable for many jobs, and low-priced. Buy it.

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Yongnuo YN-622C User's Guide Page 4