TREN
Olympus PEN E-PM2 read noise vs ISO
The Olympus PEN E-PM2 was measured at 8 ISO settings from ISO 200 to ISO 25600. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (200) read noise is 1.14 DN. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
Olympus PEN E-PM2 read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 200 | 1.141 | 0.19 |
| 400 | 1.329 | 0.41 |
| 800 | 1.866 | 0.90 |
| 1600 | 4.028 | 2.01 |
| 3200 | 7.621 | 2.93 |
| 6400 | 13.086 | 3.71 |
| 12800 | 22.627 | 4.50 |
| 25600 | 48.840 | 5.61 |