DH
Ive been shooting Canon professionally for close to 20 years and I have never encountered focusing issues like this. We currently have two Canon MK 3s a 1DX MK II and now a MK 4. We had major front-focus issues (by a meter) with the first body, even after lens calibration. We ended up sending it to Canon for calibration. This did not solve the issue, so we returned it and bought a replacement. The second body also ran into focusing issues. Cannon Pro Services diagnosed it as an issue with the auto focus assembly and replaced the part. Honestly, when you throw 20 or 30k into production costs of a shoot, you really need your gear to perform. And when 2 out of 2 Canon MK IVs are proven defective, I have a hard time trusting it. This camera will sit in a pelican case as a back-up. Ill stick with my 1DX for my work camera.
