I've recently upgraded to the full-frame sensor Canon 6D and am used to using Canon's Rebel series cameras with the added Magic Lantern firmware add-on hacks. I have a question about the auto-exposure-bracketing (AEB) quirks of the 6D.
AFAIK, best practices for capturing "tack sharp" images is to use a tripod, remote trigger, mid-range aperture, and use the camera's mirror lockup delay feature. I was able to do this fine on the Rebel series cameras--once the AEB series was triggered remotely, the camera would lock the mirror, wait about a second, expose, and repeat the process through the series of bracketed exposures.
However, on the 6D (firmware 1.1.6), the default AEB behavior is for the camera to require each exposure to be manually triggered (either remotely or using the shutter button). After searching online, others acknowledge this problem and say the solution is to turn on Live View before triggering the bracketed series. However, in that configuration the 6D slaps through the exposures as fast as possible using just the mechanical shutter (the mirror doesn't move during Live View).
While this is better, it's still not "ideal" insofar as the slapping shutter could very well be introducing vibration and increasing movement/shake as more exposures are taken. I could feel the slight vibration when placing by finger on the camera while it was going though the exposures.
Using the Magic Lantern AEB was a little better. Outside of live view, it did run through all AEB exposures, but didn't honor the mirror lockup after the first exposure. In Live View, it did run through all AEB exposures quickly, but did give a slightly longer delay between exposures than the native Canon firmware.
Given these limitations and default behaviors, is the camera shake introduced by the slapping shutter in Canon's default firmware enough to notice or worry about (I haven't noticed a difference in a few tests, but my test conditions weren't lab-quality). Have others figured out a better method of getting tack-sharp AEB images with the 6D?