Canon EOS Ra vs Canon EOS RP: read noise comparison

Input-referred read noise at base ISO: Canon EOS Ra 9.1 e⁻ (ISO 100), Canon EOS RP 36.3 e⁻ (ISO 100).

Canon EOS Ra

The Canon EOS Ra was measured at 27 ISO settings from ISO 100 to ISO 40000. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 1.92 DN, or 9.1 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 75,089 electrons; unity gain is around ISO 470.

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 Ra vs Canon EOS RP read noise table

ISO	Canon EOS Ra	Canon EOS RP
50	–	7.260
100	1.919	7.210
125	2.713	9.126
160	1.866	6.277
200	2.099	7.890
250	2.908	9.918
320	2.114	6.409
400	2.694	8.168
500	3.555	10.339
640	3.227	7.464
800	4.084	9.383
1000	5.278	11.959
1250	5.169	9.714
1600	6.453	12.381
2000	8.112	15.562
2500	8.815	14.221
3200	11.314	18.001
4000	14.320	22.943
5000	15.032	26.355
6400	18.636	33.591
8000	23.103	42.224
10000	29.651	43.411
12800	37.271	54.569
16000	46.851	68.594
20000	57.680	86.223
25600	72.004	108.383
32000	92.411	135.298
40000	114.563	166.572
51200	–	202.251
102400	–	344.892

Popular comparisons

All cameras · Open the full tool