TREN
Canon EOS 80D read noise vs ISO
The Canon EOS 80D was measured at 24 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 2.83 DN, or 5.8 electrons at the sensor. From ISO 5000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 16000 don't change analog gain (digital push). Full well at base ISO is about 32,529 electrons; unity gain is around ISO 210.
Canon EOS 80D read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 100 | 2.828 | 1.50 |
| 125 | 3.555 | 1.83 |
| 160 | 3.160 | 1.66 |
| 200 | 3.918 | 1.97 |
| 250 | 4.891 | 2.29 |
| 320 | 4.993 | 2.32 |
| 400 | 6.233 | 2.64 |
| 500 | 7.890 | 2.98 |
| 640 | 8.815 | 3.14 |
| 800 | 11.158 | 3.48 |
| 1000 | 14.026 | 3.81 |
| 1250 | 15.671 | 3.97 |
| 1600 | 19.698 | 4.30 |
| 2000 | 24.761 | 4.63 |
| 2500 | 27.474 | 4.78 |
| 3200 | 34.776 | 5.12 |
| 4000 | 44.324 | 5.47 |
| 5000 | 47.835 | 5.58 |
| 6400 | 59.714 | 5.90 |
| 8000 | 75.584 | 6.24 |
| 10000 | 93.701 | 6.55 |
| 12800 | 119.428 | 6.90 |
| 16000 | 149.086 | 7.22 |
| 25600 | ○ 224.411 | 7.81 |