TREN
Sony a380 vs Sony a390: read noise comparison
Sony a380DxO
The Sony a380 (DSLR-A380) 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 1.44 DN. From ISO 100 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
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 a380 vs Sony a390 read noise table
| ISO | Sony a380 | Sony a390 |
|---|---|---|
| 100 | 1.444 | 1.765 |
| 200 | 2.969 | 3.758 |
| 400 | 5.352 | 6.277 |
| 800 | 10.483 | 12.817 |
| 1600 | 20.252 | 24.251 |
| 3200 | 40.504 | 40.224 |
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