Canon EOS 5DS R vs Canon EOS 60D: read noise comparison

Input-referred read noise at base ISO: Canon EOS 5DS R 13.1 e⁻ (ISO 100), Canon EOS 60D 13.2 e⁻ (ISO 100).

Canon EOS 5DS R

The Canon EOS 5DS R was measured at 21 ISO settings from ISO 50 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 5.62 DN, or 13.1 electrons at the sensor. From ISO 3200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 6400 don't change analog gain (digital push). Full well at base ISO is about 33,406 electrons; unity gain is around ISO 230.

Canon EOS 60D

The Canon EOS 60D was measured at 20 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 7.21 DN, or 13.2 electrons at the sensor. From ISO 2500 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 6400 don't change analog gain (digital push). Full well at base ISO is about 26,186 electrons; unity gain is around ISO 180.

Canon EOS 5DS R vs Canon EOS 60D read noise table

ISO	Canon EOS 5DS R	Canon EOS 60D
50	5.502	–
100	5.618	7.210
125	5.696	9.126
160	5.776	6.190
200	5.979	7.621
250	6.190	9.514
320	6.589	7.311
400	7.013	9.126
500	7.568	11.551
640	8.398	10.056
800	9.514	12.641
1000	11.236	15.780
1250	13.086	16.336
1600	15.671	20.393
2000	19.160	25.813
2500	22.316	29.041
3200	26.538	36.252
4000	33.359	43.111
5000	38.319	53.446
6400	45.887	68.594
12800	90.510	129.787

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