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  • How are reviewers describing this item?
    great, flash, ex, far and iii.
  • Our engine has profiled the reviewer patterns and has determined that there is minimal deception involved.
  • Our engine has discovered that over 90% high quality reviews are present.
  • This product had a total of 92 reviews as of our last analysis date on Dec 16 2019.


Most positive reviewquestion

Nice & looks durable!

Least positive reviewquestion

Bought this to replace Canon's ST E3 RT which does not have IR Focus Assist for some dumb reason they took it off. Anyway this ...  Read More

Most authentic reviewquestion

Works great with my Canon 5D Mark iii and Canon 600EX-RT Speedlite Flash. I took this photo of a figurine right away and it wa...  Read More

Least authentic reviewquestion

Not enough review data to provide meaningful insight.

Helpful Insights


    Posted by a reviewer on Amazon

    They worked great, but they are a bit unreliable in the field (though fine in the studio).

    Posted by a reviewer on Amazon

    The problem isn't the unit itself, by the connection.

    Posted by a reviewer on Amazon

    Update firmware after get it.

    Posted by a reviewer on Amazon

    Because there are reviews floating on the net that say it's hard to upgrade the firmware on these if you have a 32 bit os (which you want to do because that enables it to work with the new 430ex iii rt), let me set your minds at ease: i am running 64bit win8.

    Posted by a reviewer on Amazon

    I now have the latest firmware on my device.

    Posted by a reviewer on Amazon

    The other issue is that the focus lamp fires its beam to the upper right, not in the center.

    Posted by a reviewer on Amazon

    But the camera still focuses ok.

Review Count History
Price History