Canon EOS 1200D vs Canon EOS 1D: read noise comparison
Input-referred read noise at base ISO: Canon EOS 1200D 12.5 e⁻ (ISO 100), Canon EOS 1D 11.2 e⁻ (ISO 200).
Canon EOS 1200D
The Canon EOS 1200D was measured at 7 ISO settings from ISO 100 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 7.06 DN, or 12.5 electrons at the sensor. From ISO 1600 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 25,353 electrons; unity gain is around ISO 180.
Canon EOS 1D
The Canon EOS 1D was measured at 12 ISO settings from ISO 100 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (200) read noise is 2.10 DN, or 11.2 electrons at the sensor. From ISO 500 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 21,961 electrons; unity gain is around ISO 1070.
Canon EOS 1200D vs Canon EOS 1D read noise table
| ISO | Canon EOS 1200D | Canon EOS 1D |
|---|---|---|
| 100 | 7.062 | 1.866 |
| 200 | 7.464 | 2.099 |
| 250 | – | 2.378 |
| 320 | – | 2.676 |
| 400 | 8.938 | 3.160 |
| 500 | – | 3.706 |
| 640 | – | 4.500 |
| 800 | 12.553 | 5.579 |
| 1000 | – | 6.821 |
| 1250 | – | 8.398 |
| 1600 | 20.252 | 10.556 |
| 3200 | 36.504 | 20.535 |
| 6400 | 68.594 | – |
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