TREN
Mamiya Leaf Aptus75S read noise vs ISO
The Mamiya Leaf Aptus75S was measured at 5 ISO settings from ISO 50 to ISO 800. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (50) read noise is 23.10 DN. From ISO 100 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
Mamiya Leaf Aptus75S read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 50 | 23.103 | 4.53 |
| 100 | 41.355 | 5.37 |
| 200 | 79.893 | 6.32 |
| 400 | 140.070 | 7.13 |
| 800 | 308.687 | 8.27 |