Quote Originally Posted by neuroanatomist View Post
The R3 does support focus bracketing using flash. It waits for a Canon flash in the hotshoe to be fully charged before taking the next frame, but also lets you set an interval delay to allow for a 3rd party flash (including via a PC sync cord) or wirelessly-controlled Canon flashes to recycle.

https://cam.start.canon/en/C010/manu...ng-1_0280.html
Hot damn! I did not know that. Now I can sell my 5D III!

Now why in the world couldn't Canon do the same thing except with a traditional shutter?