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Customer Review

on April 13, 2012
The main thing that sets this flash apart from others is the built-in radio slave system, and Canon has nailed this one!

Invented by Radiopoper and improved upon by Pocketwizard, radio slaves have been a huge asset for working fast on location with TTL control of off-camera speedlights. But they have always been too fiddly, unreliable, and ungainly. Finally, we Canon shooters can pop a 600EX-rt on the camera, others on clamps or stands, turn them on and shoot with full control of several lights at once!

Seriously, I keep one set to "master" and two others set to "slave", and I just turn them on and instantly all three show by their green lights that they are communicating and ready!

You have more control over your ttl slaves than ever before. Five independent groups with different output settings. To avoid interference with other photographers' strobes, choose from not only 15 channels, but also up to 10,000 "ID" numbers. Save settings to memory.

But my favorite feature--and the reason I decided to write a review--is that they are easy to use and reliable! I've used mine heavily for a couple of weeks now and haven't had a single misfire (a frequent issue I had with both Radiopoppers and Pocketwizards). Menus are easily accessible and--for once--make sense. And best of all, one less thing to pack for each light.

These are the only faults I've found so far:
1. For old guys like me, it would have been nice if the continuous scale for ratios were easier to see (at least a highlighted "1:1" in the middle).
2. The stated range can't match what Pocketwizard claims, but I've never needed to fire a strobe from farther than 100' anyway (at least not with TTL).
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