A previous version of this review, published June 19, 2020, contained erroneous test data that affected the scoring. This new version of the review contains the correct data and scores. We regret any inconvenience this may have caused Canon and our readers.
Conclusion from DxOMark:
Sports journalism is a highly competitive field and requires a camera that can keep pace with the action unfolding in front of the lens. The Canon EOS-1D X Mark III has been designed with that one goal in mind. Although we at DXOMARK test only sensor performance and no other features, at face value it’s an incredibly fast DSLR with not only blazing AF speed, incredible continuous shooting rates and a prodigious buffer, but also an equally impressive sensor.
Admittedly, it’s not quite at the bleeding edge in our metrics for sensor performance, even if the Canon EOS-1D X Mark III sees a dramatic improvement in dynamic range. At this level, there’s far more to camera selection than outright sensor performance.
Like the Nikon D5 and the Sony a9 II, such cameras are highly specific and a niche purchase. If you’re already a Canon user with a significant investment in lenses and other dedicated system accessories, then there’s not enough difference here in sensor dynamics to get you switch brands. If you’re new to the market, there’s a lot to consider, but even then the Canon EOS-1D X Mark III is still more than a worthy contender for your hard-earned cash.