Is this guy a troll? No one even knows what the hell he is talking about.
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I have two Canon 600 flashes and the Canon ST-E3-RT. Awesome set-up for me, but the ST-E3-RT lacks an AF assist beam, so in very low light (single 60w bulb in a bathroom for example) it gets dodgy, but outside as a fill in set-up it's fabulous, fast, works, and is very portable.The ST-E3-RT is awesome. I love using it.
I've found that if you half press the shutter button and wait for the AF light to and point to flash, it takes 3 sec or more. However, if I just press the shutter button down all the way, it focuses in about 1 second or less and fires with perfectly sharp focus.
Check page 77 of the manual. There is a mention of this, I think:I never use single point spot but from reading that it seems like the auto focus points might be too small and are missing the assist beam? Is this the problem???
* With Single-Point Spot AF, focusing with the Speedlite's AF-Assist beam may be difficult
* If the camera cannot focus with the EOS-dedicated Speedlite's AF-Assist beam, set the AF area selection mode to Single-Point AF (Manual Selection) and select the center AF point to focus.
5D III has some issues with AF-Assist Beam under low light - Speedlite 600. You might want to double check.It is still an amazing flash. I actually bought 4 and I use them for photoshoots. I started using them for the club months later and that was when I found out about the issue. One thing I have never tried was all points auto AF selection. I honestly don't trust that setting especially when using a 2.8 aperture but next time I use it at a club I might try it.
Thanks for the info RayI wish I could manually focus in the dark. LOL
2 - 5 seconds!!!! I can manual focus quicker than that. Maybe the tape from the light leak fix is interfering with AF assist
For me that's getting on for not fit for purpose. I look forward to seeing if/how this is addressed