TREN
Leica M10-P read noise vs ISO
The Leica M10-P was measured at 7 ISO settings from ISO 100 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 1.97 DN, or 5.2 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 42,955 electrons; unity gain is around ISO 260.
Leica M10-P read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 100 | 1.972 | 0.98 |
| 200 | 2.329 | 1.22 |
| 400 | 2.969 | 1.57 |
| 800 | 5.464 | 2.45 |
| 1600 | 10.056 | 3.33 |
| 3200 | 19.973 | 4.32 |
| 6400 | 40.224 | 5.33 |