Most helpful critical review
42 of 49 people found the following review helpful
Serious over-heating issues
on May 19, 2013
After shooting with three Canon 580EXII flashes and three Pocket Wizard TT5 triggers and a Pocket Wizard AC3 Zone Controller, I was so frustrated by the complete lack of consistent flash-firing that I sold all that stuff and bought three of the Canon 600EX-RT flashes. I use a 5D3 so compatibility isn't an issue. What is an issue is the overheating of the 600EX-RT. Even when I use brand-new batteries, and an external battery pack for my on-camera flash, the on-camera flash hits the 10-second recycle shutdown after only a few flashes. This happened to me last month at a wedding and I didn't know what was going on. I changed all the batteries, thinking that was the issue, but it happened again. I turned off my off-camera flashes, set my on-camera flash back to its regular settings (not acting as a transmitter), and everything worked great...except the fact that I couldn't use the other two flashes at all, the ones I'd just paid $1200 for. This happened the rest of the day and it was extremely frustrating.
This has only happened in full sunlight, when I'm using one or more of my flashes at full power. I understand that I cannot shoot them at full power for extended periods of time, but I'd literally only shot two frames before the 10-second recycle kicked in (and, hence, no working flash at all until those 10 seconds had elapsed). Setting my Custom Functions so my flashes will still fire even when not fully re-charged is pointless; I set all my exposures just the way I want them...firing at anything less (or more) than I intended will create a bad looking image. As a professional photographer I expect professional results from Canon's top-of-the-line speedlight.