TREN
Sony DSC-RX0 read noise vs ISO
The Sony DSC-RX0 was measured at 23 ISO settings from ISO 80 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (125) read noise is 3.41 DN, or 3.6 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 16,280 electrons; unity gain is around ISO 130.
Sony DSC-RX0 read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 80 | ○ 3.340 | 1.74 |
| 100 | ○ 3.918 | 1.97 |
| 125 | 3.411 | 1.77 |
| 160 | 3.972 | 1.99 |
| 200 | 4.595 | 2.20 |
| 250 | ▼ 4.532 | 2.18 |
| 320 | ▼ 5.315 | 2.41 |
| 400 | ▼ 6.277 | 2.65 |
| 500 | ▼ 7.674 | 2.94 |
| 640 | ▼ 9.000 | 3.17 |
| 800 | ▼ 10.703 | 3.42 |
| 1000 | ▼ 13.086 | 3.71 |
| 1250 | ▼ 15.455 | 3.95 |
| 1600 | ▼ 19.160 | 4.26 |
| 2000 | ▼ 22.627 | 4.50 |
| 2500 | ▼ 26.538 | 4.73 |
| 3200 | ▼ 35.017 | 5.13 |
| 4000 | ▼ 44.324 | 5.47 |
| 5000 | ▼ 55.715 | 5.80 |
| 6400 | ▼ 70.035 | 6.13 |
| 8000 | ▼ 87.427 | 6.45 |
| 10000 | ▼ 112.206 | 6.81 |
| 12800 | ▼ 141.044 | 7.14 |