Ron in Northern California says:
I love your resource here. I have a Canon 5D MKIII with 600EX-RT speedlite and ST-E3-RT trigger. I've been shooting for a couple of months using brackets and Lightroom HDR. I had some color consistency issues and after reading some your posts on using a manual flash I added flash to my bracketing and it really helped! Unfortunately, I discovered in the process that my wonderful Canon equipment doesn't support AEB with flash. Not even with the flash set to Manual. Is there a reasonably priced manual trigger that will support the automatic exposure bracketing?
I doubt that you'll be able to get any flash or trigger to work with auto exposure bracketing (AEB). The reason AEB doesn't work with flash is that the AEB function doesn't have a way of waiting for the flash to recycle. But there's a very simple solution for this problem that will allow you to use your current flash gear as described in this post.
This bracketing technique is manual. That is you are changing the shutter speed manually and pressing the shutter manually for each bracket so while you are bracketing just make sure the flash recycles each time before you press the shutter.
Notice that this technique is also making sure that you are capturing the full brightness range of the space. That is if you follow this technique when the room is very bright you may be taking more brackets than if the room has a smaller brightness range.
Update 7/12: I was wrong, there are flashes that will work with AEB! See comments for details.