This is a really good product. I bought it to be able to control my Canon flashes via Odin receivers, or to have it off camera being controlled by my Odin transmitter and not bother with receivers, etc.
This flash works wonderfully. I haven't had any glitches so far. However, it is a bit under-powered compared to my Canon 580EX II speedlites. It's close to one stop less powerful. Two thirds of a stop to be exact.
But the biggest drawback is that it heats up real fast -just after about 5 consecutive flashes*, and the heat protection kicks in to extend the recycle time (BTW, with fresh batteries). In the same situation my Canon flashes will go as many as 15 times before the slow recycle kicks in.
The funny thing is that sometimes with the red light off (meaning the flash is not ready to fire), I can still fire it and it produces a normal ETTL illumination as if the light was on and the flash was ready to fire.
All that said,I'm still not 100% sure about my conclusions. More tests are needed. I will get back with more info at some point.
* I never use straight flash. always bouncing off ceilings, walls, etc
The cam I'm using with this flash is Canon 5D Mark II
Edit: A little correction. The flash does not really heat up more than Canon flashes. It's just that the heat protection kicks in too soon. This could probably be addressed in a future firmware update.
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