TREN
Sony RX10 III read noise vs ISO
The Sony RX10 III (DSC-RX10M3) was measured at 24 ISO settings from ISO 64 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 3.12 DN, or 3 electrons at the sensor. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 14,868 electrons; unity gain is around ISO 100.
Sony RX10 III read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 64 | ○ 3.138 | 1.65 |
| 80 | ○ 3.655 | 1.87 |
| 100 | 3.117 | 1.64 |
| 125 | 3.605 | 1.85 |
| 160 | 4.228 | 2.08 |
| 200 | 4.891 | 2.29 |
| 250 | 5.897 | 2.56 |
| 320 | 7.062 | 2.82 |
| 400 | 8.398 | 3.07 |
| 500 | 9.987 | 3.32 |
| 640 | 12.042 | 3.59 |
| 800 | 14.825 | 3.89 |
| 1000 | 17.268 | 4.11 |
| 1250 | 21.407 | 4.42 |
| 1600 | 26.355 | 4.72 |
| 2000 | 31.341 | 4.97 |
| 2500 | 38.586 | 5.27 |
| 3200 | 48.503 | 5.60 |
| 4000 | 63.119 | 5.98 |
| 5000 | 77.708 | 6.28 |
| 6400 | ▼ 79.341 | 6.31 |
| 8000 | ▼ 100.427 | 6.65 |
| 10000 | ▼ 125.366 | 6.97 |
| 12800 | ▼ 157.586 | 7.30 |