Canon EOS 350D vs Canon EOS 4000D: read noise comparison
Input-referred read noise at base ISO: Canon EOS 350D 18.9 e⁻ (ISO 100), Canon EOS 4000D 11.8 e⁻ (ISO 100).
Canon EOS 350D
The Canon EOS 350D was measured at 5 ISO settings from ISO 100 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 1.93 DN, or 18.9 electrons at the sensor. Read noise keeps falling across the measured range, so the camera isn't fully ISO-invariant there. Full well at base ISO is about 37,660 electrons; unity gain is around ISO 980.
Canon EOS 4000D
The Canon EOS 4000D was measured at 8 ISO settings from ISO 100 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 7.01 DN, or 11.8 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 24,095 electrons; unity gain is around ISO 170.
Canon EOS 350D vs Canon EOS 4000D read noise table
| ISO | Canon EOS 350D | Canon EOS 4000D |
|---|---|---|
| 100 | 1.932 | 7.013 |
| 200 | 2.114 | 7.464 |
| 400 | 2.479 | 8.754 |
| 800 | 3.364 | 11.713 |
| 1600 | 5.389 | 18.252 |
| 3200 | – | 32.223 |
| 6400 | – | 64.000 |
| 12800 | – | 123.640 |
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