TREN
Leica M10 MONOCHROM read noise vs ISO
The Leica M10 MONOCHROM was measured at 29 ISO settings from ISO 160 to ISO 102400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (160) read noise is 2.14 DN, or 6.1 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 46,751 electrons; unity gain is around ISO 450.
Leica M10 MONOCHROM read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 160 | 2.144 | 1.10 |
| 200 | 2.329 | 1.22 |
| 250 | 2.250 | 1.17 |
| 320 | 2.428 | 1.28 |
| 400 | 2.848 | 1.51 |
| 500 | 3.074 | 1.62 |
| 640 | 3.837 | 1.94 |
| 800 | 2.928 | 1.55 |
| 1000 | 3.655 | 1.87 |
| 1250 | 4.084 | 2.03 |
| 1600 | 4.891 | 2.29 |
| 2000 | 6.233 | 2.64 |
| 2500 | 7.568 | 2.92 |
| 3200 | 9.448 | 3.24 |
| 4000 | 11.632 | 3.54 |
| 5000 | 14.825 | 3.89 |
| 6400 | 18.507 | 4.21 |
| 8000 | 23.264 | 4.54 |
| 10000 | 29.446 | 4.88 |
| 12800 | 36.002 | 5.17 |
| 16000 | 44.942 | 5.49 |
| 20000 | 58.485 | 5.87 |
| 25600 | 72.004 | 6.17 |
| 32000 | 89.264 | 6.48 |
| 40000 | 121.938 | 6.93 |
| 51200 | 146.018 | 7.19 |
| 64000 | 176.069 | 7.46 |
| 80000 | 247.280 | 7.95 |
| 102400 | 296.112 | 8.21 |