Sony DSC-R1 vs Sony DSC-RX1: read noise comparison
Input-referred read noise at base ISO: Sony DSC-R1 10.5 e⁻ (ISO 200), Sony DSC-RX1 4.9 e⁻ (ISO 100).
Sony DSC-R1
The Sony DSC-R1 was measured at 5 ISO settings from ISO 200 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (200) read noise is 12.91 DN, or 10.5 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 12,866 electrons; unity gain is around ISO 160.
Sony DSC-RX1
The Sony DSC-RX1 was measured at 12 ISO settings from ISO 50 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 1.13 DN, or 4.9 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 68,744 electrons; unity gain is around ISO 430.
Sony DSC-R1 vs Sony DSC-RX1 read noise table
| ISO | Sony DSC-R1 | Sony DSC-RX1 |
|---|---|---|
| 50 | – | 1.117 |
| 80 | – | 1.485 |
| 100 | – | 1.133 |
| 125 | – | 1.292 |
| 200 | 12.906 | 1.765 |
| 400 | 26.173 | 2.969 |
| 800 | 49.522 | 5.352 |
| 1600 | 99.044 | 10.339 |
| 3200 | 192.672 | 20.678 |
| 6400 | – | 41.070 |
| 12800 | – | 83.286 |
| 25600 | – | 164.279 |
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