TREN
Hasselblad X2D-100c read noise vs ISO
The Hasselblad X2D-100c was measured at 10 ISO settings from ISO 64 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (64) read noise is 3.97 DN, or 2.8 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 12800 don't change analog gain (digital push). Full well at base ISO is about 34,682 electrons; unity gain is around ISO 50.
Hasselblad X2D-100c read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 64 | 3.972 | 1.99 |
| 100 | 6.233 | 2.64 |
| 200 | 5.464 | 2.45 |
| 400 | 10.629 | 3.41 |
| 800 | 20.535 | 4.36 |
| 1600 | 39.671 | 5.31 |
| 3200 | 78.793 | 6.30 |
| 6400 | 158.683 | 7.31 |
| 12800 | 312.996 | 8.29 |
| 25600 | ▲ 568.100 | 9.15 |