TREN
Sony a390 vs Sony a450: read noise comparison
Sony a390DxO
The Sony a390 (DSLR-A390) was measured at 6 ISO settings from ISO 100 to ISO 3200. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (100) read noise is 1.77 DN. Read noise keeps falling across the measured range, so the camera isn't fully ISO-invariant there.
Sony a450DxO
The Sony a450 (DSLR-A450) was measured at 7 ISO settings from ISO 200 to ISO 12800. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (200) read noise is 1.40 DN. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
Sony a390 vs Sony a450 read noise table
| ISO | Sony a390 | Sony a450 |
|---|---|---|
| 100 | 1.765 | – |
| 200 | 3.758 | 1.404 |
| 400 | 6.277 | 2.028 |
| 800 | 12.817 | 3.340 |
| 1600 | 24.251 | 6.727 |
| 3200 | 40.224 | 13.269 |
| 6400 | – | 23.103 |
| 12800 | – | 49.867 |
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