Canon EOS R10 vs Canon EOS R10 (ES): read noise comparison

Input-referred read noise at base ISO: Canon EOS R10 4.1 e⁻ (ISO 100), Canon EOS R10 (ES) 8.2 e⁻ (ISO 100).

Canon EOS R10

The Canon EOS R10 was measured at 26 ISO settings from ISO 100 to ISO 32000. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 2.01 DN, or 4.1 electrons at the sensor. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 32,681 electrons; unity gain is around ISO 210.

Canon EOS R10 (ES)

The Canon EOS R10 (ES) 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 3.86 DN, or 8.2 electrons at the sensor. 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). Full well at base ISO is about 33,823 electrons; unity gain is around ISO 210.

Canon EOS R10 vs Canon EOS R10 (ES) read noise table

ISO	Canon EOS R10	Canon EOS R10 (ES)
100	2.014	3.864
125	2.676	5.098
160	3.605	6.635
200	2.789	4.563
250	3.655	6.021
320	4.925	7.727
400	4.724	6.277
500	6.277	8.168
640	8.112	10.556
800	9.318	11.004
1000	11.876	13.833
1250	15.242	17.630
1600	17.148	19.027
2000	22.009	24.251
2500	27.858	30.274
3200	31.125	33.359
4000	39.397	41.933
5000	49.867	53.076
6400	41.933	42.224
8000	53.076	53.817
10000	66.718	67.182
12800	84.449	85.627
16000	107.635	108.383
20000	135.298	135.298
25600	170.072	171.255
32000	212.306	209.383
51200	–	310.834

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