DxOMark completed their tests and review of 45MP sensor inside the Canon EOS R5 full frame mirrorless camera ($3,899): The Canon EOS R5 gets an outstanding overall DxOmark score of 95 points, with a combination of 25.3 bits color depth, 14.6 EV dynamic range, and 3042 ISO low-light. The EOS R5 sensor represents a high water mark for Canon.
Conclusion from DxOMark:
As the true successor to Canon EOS 5D Mark IV, the mirrorless Canon EOS R5 was one of the most highly anticipated cameras of the year. When it finally arrived, the technical specifications— a high-resolution stabilized body, super-fast burst rates, highly capable dual-pixel AF II, and some incredible video capabilities—exceeded all expectations. But it wasn’t without some downsides. Extended 8K DCI and oversampled 4K video capture may have been a bit of stretch in such a highly compact body, but there’s no denying Canon really did push the boundaries of what’s possible.
As for sensor performance, the EOS R5 sensor represents a high water mark for Canon. Maximum dynamic range is competitive with the best in class, and the R5 sensor offers a useful advantage at some crucial ISO settings over its rivals. It also has excellent color and low noise at high ISOs, which all go toward making the Canon EOS R5 one of the most well-rounded performers in this important category. It may have taken a while to get here, but the Canon EOS R5 looks set to be the one to beat.
You can read the full review at DxOMark.