Leica M8 vs Leica M9: read noise comparison
Input-referred read noise at base ISO: Leica M8 10.9 e⁻ (ISO 160), Leica M9 15.2 e⁻ (ISO 160).
Leica M8
The Leica M8 was measured at 5 ISO settings from ISO 160 to ISO 2500. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (160) read noise is 6.68 DN, or 10.9 electrons at the sensor. From ISO 160 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 26,800 electrons; unity gain is around ISO 260.
Leica M9
The Leica M9 was measured at 14 ISO settings from ISO 80 to ISO 2500. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (160) read noise is 7.62 DN, or 15.2 electrons at the sensor. From ISO 320 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 32,788 electrons; unity gain is around ISO 320.
Leica M8 vs Leica M9 read noise table
| ISO | Leica M8 | Leica M9 |
|---|---|---|
| 80 | – | 7.568 |
| 160 | 6.681 | 7.621 |
| 200 | – | 9.383 |
| 250 | – | 11.876 |
| 320 | 13.361 | 12.729 |
| 400 | – | 16.795 |
| 500 | – | 18.896 |
| 640 | 28.840 | 25.281 |
| 800 | – | 32.672 |
| 1000 | – | 42.518 |
| 1250 | 60.969 | 53.817 |
| 1600 | – | 64.000 |
| 2000 | – | 83.865 |
| 2500 | 132.514 | 105.420 |
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