Nikon D1H vs Nikon D1X: read noise comparison
Input-referred read noise at base ISO: Nikon D1H 19.3 e⁻ (ISO 200), Nikon D1X 17 e⁻ (ISO 125).
Nikon D1H
The Nikon D1H was measured at 12 ISO settings from ISO 200 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (200) read noise is 2.28 DN, or 19.3 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 1600 don't change analog gain (digital push). Full well at base ISO is about 34,684 electrons; unity gain is around ISO 1690.
Nikon D1X
The Nikon D1X was measured at 11 ISO settings from ISO 125 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (125) read noise is 2.17 DN, or 17 electrons at the sensor. From ISO 160 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 800 don't change analog gain (digital push). Full well at base ISO is about 32,107 electrons; unity gain is around ISO 980.
Nikon D1H vs Nikon D1X read noise table
| ISO | Nikon D1H | Nikon D1X |
|---|---|---|
| 125 | – | 2.173 |
| 160 | – | 2.549 |
| 200 | 2.282 | 3.182 |
| 250 | 2.603 | 3.811 |
| 320 | 3.138 | 4.691 |
| 400 | 4.000 | 5.897 |
| 500 | 4.959 | 7.311 |
| 640 | 6.320 | 9.318 |
| 800 | 7.890 | 11.392 |
| 1000 | 9.714 | – |
| 1250 | 12.295 | – |
| 1600 | 15.455 | 22.785 |
| 3200 | 30.696 | 45.570 |
| 6400 | 60.969 | – |
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