TREN
Panasonic Lumix DMC-G6 read noise vs ISO
The Panasonic Lumix DMC-G6 was measured at 23 ISO settings from ISO 160 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (160) read noise is 1.73 DN, or 5.4 electrons at the sensor. From ISO 640 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 8000 don't change analog gain (digital push). Full well at base ISO is about 12,444 electrons; unity gain is around ISO 500.
Panasonic Lumix DMC-G6 read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 160 | 1.729 | 0.79 |
| 200 | 2.129 | 1.09 |
| 250 | 2.639 | 1.40 |
| 320 | 2.532 | 1.34 |
| 400 | 3.182 | 1.67 |
| 500 | 4.056 | 2.02 |
| 640 | 4.199 | 2.07 |
| 800 | 5.278 | 2.40 |
| 1000 | 6.727 | 2.75 |
| 1250 | 7.945 | 2.99 |
| 1600 | 9.987 | 3.32 |
| 2000 | 13.548 | 3.76 |
| 2500 | 15.671 | 3.97 |
| 3200 | 20.112 | 4.33 |
| 4000 | 27.284 | 4.77 |
| 5000 | 30.910 | 4.95 |
| 6400 | 42.224 | 5.40 |
| 8000 | 56.493 | 5.82 |
| 10000 | ○ 66.257 | 6.05 |
| 12800 | ○ 83.286 | 6.38 |
| 16000 | ○ 104.691 | 6.71 |
| 20000 | ○ 126.238 | 6.98 |
| 25600 | ○ 157.586 | 7.30 |