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Phase One P45+ vs Phase One P65+: read noise comparison
Phase One P45+DxO
The Phase One P45+ was measured at 5 ISO settings from ISO 64 to ISO 800. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (64) read noise is 18.13 DN. From ISO 64 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
Phase One P65+DxO
The Phase One P65+ 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 21.86 DN. Read noise keeps falling across the measured range, so the camera isn't fully ISO-invariant there.
Phase One P45+ vs Phase One P65+ read noise table
| ISO | Phase One P45+ | Phase One P65+ |
|---|---|---|
| 64 | 18.126 | – |
| 100 | 42.518 | 21.857 |
| 200 | 85.036 | 40.504 |
| 400 | 170.072 | 85.036 |
| 800 | 340.144 | 171.255 |
| 1600 | – | 372.217 |
| 3200 | – | 621.668 |
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