Canon EOS 100D vs Canon EOS 1200D: read noise comparison
Input-referred read noise at base ISO: Canon EOS 100D 14.5 e⁻ (ISO 100), Canon EOS 1200D 12.5 e⁻ (ISO 100).
Canon EOS 100D
The Canon EOS 100D was measured at 9 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 7.52 DN, or 14.5 electrons at the sensor. From ISO 3200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 12800 don't change analog gain (digital push). Full well at base ISO is about 27,646 electrons; unity gain is around ISO 190.
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 100D vs Canon EOS 1200D read noise table
| ISO | Canon EOS 100D | Canon EOS 1200D |
|---|---|---|
| 100 | 7.516 | 7.062 |
| 200 | 8.112 | 7.464 |
| 400 | 9.781 | 8.938 |
| 800 | 13.548 | 12.553 |
| 1600 | 21.706 | 20.252 |
| 3200 | 38.055 | 36.504 |
| 6400 | 73.009 | 68.594 |
| 12800 | 145.009 | – |
| 25600 | 268.727 | – |
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