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Canon EOS R10 (EFCS) vs Canon EOS R100: read noise comparison

Canon EOS R10 (EFCS)

The Canon EOS R10 (EFCS) was measured at 27 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 1.92 DN. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 32000 don't change analog gain (digital push).

Canon EOS R100

The Canon EOS R100 was measured at 23 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 3.48 DN, or 7.3 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 12800 don't change analog gain (digital push). Full well at base ISO is about 33,045 electrons; unity gain is around ISO 210.

Canon EOS R10 (EFCS) vs Canon EOS R100 read noise table

ISOCanon EOS R10 (EFCS)Canon EOS R100
1001.9193.482
1252.6034.469
1603.5553.706
2002.7514.659
2503.5555.938
3204.9254.925
4004.6596.190
5006.1487.945
6408.0569.781
8009.19012.210
100011.79415.562
125015.03216.564
160017.26820.678
200022.16226.173
250027.66529.243
320031.34137.014
400039.39746.851
500050.21350.213
640042.81463.119
800053.81779.893
1000066.71898.360
1280085.627121.938
16000109.896–
20000135.298–
25600172.446233.941
32000210.839–
51200308.687–

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Data: Photons to Photos · © William J. Claff