Canon EOS M3 vs Canon EOS M50: read noise comparison

Input-referred read noise at base ISO: Canon EOS M3 10.9 e⁻ (ISO 100), Canon EOS M50 5.1 e⁻ (ISO 100).

Canon EOS M3

The Canon EOS M3 was measured at 22 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 6.82 DN, or 10.9 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 22,915 electrons; unity gain is around ISO 160.

Canon EOS M50

The Canon EOS M50 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 2.89 DN, or 5.1 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 28,242 electrons; unity gain is around ISO 180.

Canon EOS M3 vs Canon EOS M50 read noise table

ISO	Canon EOS M3	Canon EOS M50
100	6.821	2.888
125	8.456	3.758
160	5.696	3.434
200	7.260	4.287
250	9.000	5.502
320	6.727	6.409
400	8.515	8.112
500	10.411	10.196
640	9.448	10.339
800	11.713	13.269
1000	14.621	16.564
1250	14.320	19.698
1600	18.001	24.420
2000	22.471	31.341
2500	23.918	33.825
3200	29.446	43.411
4000	37.014	54.569
5000	39.397	58.892
6400	49.867	74.028
8000	61.393	93.701
10000	77.708	115.360
12800	97.006	143.013
16000	–	176.069
20000	–	213.783
25600	–	259.574

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