This is in order to combat element displacement errors or when using lens adapters such as the Sigma MC-11 or the Metabones adapters. The fact that most mirrorless systems don’t have an ‘exclusive’ autofocus sensor does eliminate the need for AF Micro adjustments for the body to be done, but some mirrorless cameras such as the Sony A7 series and some Olympus models allow for Micro adjustments. This is because most mirrorless cameras use a different method in which focus calculations are done as in directly off the imaging sensor chip and not on a separate focusing sensor, unlike DSLR’s which do.

You might be thinking ‘hang on a minute, I thought you didn’t need to calibrate a mirrorless camera!’ and yes, it is true that with the majority of them don’t. The other day we were incredibly excited to have the opportunity to calibrate one of the new flagship Nikon Z7 mirrorless cameras for a regular customer. We have seen a lot of information, some correct and some incorrect about mirrorless cameras and lens calibration.