Canon News has completed a full analysis of the Canon EOS M6 Mark II and the effect shutter shock has on images. Unfortunately, it looks like this is one area in which the Canon EOS M6 Mark II is a bit weak.
The Canon EOS M6 Mark II lacks an Electronic First Curtain Shutter, which is a strange omission and does have a negative impact on image sharpness.
From Canon News:
The M6 Mark II is a hopped-up little camera that is fun to use and is an amazing performer – but the deliberate lack of EFCS on this camera reduces it’s ability in some cases to deliver the highest IQ possible. Now to be fair, the M6 Mark II (as well as the 90D) are the two most exacting and demanding cameras on the market today, as both have 32.5MP APS-C sensors when the rest of the industry mostly has 24MP. However, this makes it more puzzling as it is more prone to show the effects of shutter shock than any other camera as well. Read the full analysis
While we all love graphs and numbers when analyzing cameras and lenses, this issue probably won’t be noticed by a vast majority of shooters.