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Canon EOS R8 vs Canon EOS RP: read noise comparison

Input-referred read noise at base ISO: Canon EOS R8 6.1 e⁻ (ISO 100), Canon EOS RP 36.3 e⁻ (ISO 100).

Canon EOS R8

The Canon EOS R8 was measured at 33 ISO settings from ISO 50 to ISO 204800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 1.04 DN, or 6.1 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 102400 don't change analog gain (digital push). Full well at base ISO is about 92,859 electrons; unity gain is around ISO 590.

Canon EOS RP

The Canon EOS RP was measured at 30 ISO settings from ISO 50 to ISO 102400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 7.21 DN, or 36.3 electrons at the sensor. From ISO 10000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 40000 don't change analog gain (digital push). Full well at base ISO is about 79,455 electrons; unity gain is around ISO 500.

Canon EOS R8 vs Canon EOS RP read noise table

ISOCanon EOS R8Canon EOS RP
501.0427.260
1001.0357.210
1251.4549.126
1602.0426.277
2001.5057.890
2502.0719.918
3202.8686.409
4001.2578.168
5001.77810.339
6402.4797.464
8002.0999.383
10002.84811.959
12503.8379.714
16003.89112.381
20005.02815.562
25006.45314.221
32007.21018.001
40008.93822.943
500011.31426.355
640012.21033.591
800015.56242.224
1000019.56243.411
1280024.25154.569
1600030.48468.594
2000038.31986.223
2560048.840108.383
3200059.714135.298
4000076.109166.572
5120096.336202.251
64000122.786–
80000152.219–
102400194.012344.892
204800282.088–

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Data: Photons to Photos · © William J. Claff