TREN
Panasonic Lumix DMC-GF1 read noise vs ISO
The Panasonic Lumix DMC-GF1 was measured at 16 ISO settings from ISO 100 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 4.03 DN, or 14 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 14,148 electrons; unity gain is around ISO 350.
Panasonic Lumix DMC-GF1 read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 100 | 4.028 | 2.01 |
| 125 | 5.063 | 2.34 |
| 160 | 6.364 | 2.67 |
| 200 | 6.190 | 2.63 |
| 250 | 7.781 | 2.96 |
| 320 | 9.781 | 3.29 |
| 400 | 11.632 | 3.54 |
| 500 | 14.520 | 3.86 |
| 640 | 18.252 | 4.19 |
| 800 | 22.471 | 4.49 |
| 1000 | 28.246 | 4.82 |
| 1250 | 35.506 | 5.15 |
| 1600 | 45.570 | 5.51 |
| 2000 | 56.886 | 5.83 |
| 2500 | 72.004 | 6.17 |
| 3200 | 91.773 | 6.52 |