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Canon EOS 850D vs Canon EOS 90D: read noise comparison

Input-referred read noise at base ISO: Canon EOS 850D 6 e⁻ (ISO 100), Canon EOS 90D 6.5 e⁻ (ISO 100).

Canon EOS 850D

The Canon EOS 850D was measured at 26 ISO settings from ISO 100 to ISO 51200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 2.97 DN, or 6 electrons at the sensor. From ISO 5000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 25600 don't change analog gain (digital push). Full well at base ISO is about 32,267 electrons; unity gain is around ISO 200.

Canon EOS 90D

The Canon EOS 90D was measured at 25 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 3.92 DN, or 6.5 electrons at the sensor. From ISO 5000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 26,435 electrons; unity gain is around ISO 170.

Canon EOS 850D vs Canon EOS 90D read noise table

ISOCanon EOS 850DCanon EOS 90D
1002.9693.918
1253.8915.098
1602.9693.732
2003.5554.691
2504.6915.979
3205.4644.627
4006.9165.856
5008.8157.464
6408.9386.681
80011.2368.340
100014.22110.629
125016.45011.081
160020.82114.026
200025.99217.630
250029.65119.427
320036.50424.084
400046.20630.696
500049.52233.591
640062.68341.933
800078.79353.076
1000097.00664.893
12800120.25981.572
16000152.219101.829
20000188.706128.000
25600233.941159.786
51200424.612–

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Data: Photons to Photos · © William J. Claff