Photons to Photos published its Canon EOS R1 results, which are pretty good especially compared to the Sony a9III. The Canon EOS R1 is quite competitive given its unique sensor, but if you care about getting the maximum PDR, then the Canon EOS R3 is a great option, and it can almost keep up with the Canon EOS R1. If you want to play with the results yourself, you can do so here, and you can check out some of the raw numbers from comparable models below.
| Model name | Maximum Dynamic Range | Low Light ISO | Low Light EV |
| EOS R1 | 10.82 | 5582 | 10.80 |
| EOS R3 | 11.91 | 6617 | 11.05 |
| EOS-1DX III | 11.26 | 4915 | 10.62 |
| EOS R6 II | 11.52 | 5575 | 10.80 |
| EOS R5 II | 11.45 | 4846 | 10.60 |
| Z9 | 11.30 | 4144 | 10.37 |
| α9II | 10.90 | 5709 | 10.84 |
| α9III | 10.00 | 4646 | 10.54 |
| α1 | 11.36 | 5215 | 10.70 |
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Canon EOS R1: B&H Photo / Amazon / Adorama
Canon R3: B&H Photo / Amazon / Adorama
Canon EOS R5 Mark II: B&H Photo / Amazon / Adorama
Canon EOS R6 Mark II: B&H Photo / Amazon / Adorama
Sony A1: B&H Photo / Amazon / Moment / Adorama
Sony a9III: B&H Photo / Amazon / Adorama
Nikon Z9: B&H Photo / Amazon / Adorama