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Canon EOS R7 (EFCS) vs Canon EOS R7 (ES): read noise comparison

Canon EOS R7 (EFCS)

The Canon EOS R7 (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 2.46 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 R7 (ES)

The Canon EOS R7 (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 4.26 DN, or 7.6 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 28,452 electrons; unity gain is around ISO 180.

Canon EOS R7 (EFCS) vs Canon EOS R7 (ES) read noise table

ISOCanon EOS R7 (EFCS)Canon EOS R7 (ES)
1002.4624.257
1253.2725.540
1604.2877.160
2003.5555.063
2504.6596.543
3206.1488.515
4004.0565.502
5005.3527.062
6407.0629.254
8007.1608.168
10009.19010.411
125011.87613.269
160012.46712.906
200016.00016.564
250020.25221.112
320020.96621.112
400026.35526.723
500033.35933.591
640036.00236.504
800045.88745.887
1000056.49356.886
1280071.50670.035
1600088.64789.264
20000107.635108.383
25600135.298135.298
32000164.279164.279
51200240.518240.518

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Data: Photons to Photos · © William J. Claff