Sony RX100 V vs Sony RX100 VII: read noise comparison

Input-referred read noise at base ISO: Sony RX100 V 3.7 e⁻ (ISO 125), Sony RX100 VII 3.1 e⁻ (ISO 100).

Sony RX100 V

The Sony RX100 V (DSC-RX100M5) was measured at 23 ISO settings from ISO 80 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (125) read noise is 3.97 DN, or 3.7 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 5000 don't change analog gain (digital push). Full well at base ISO is about 14,558 electrons; unity gain is around ISO 120.

Sony RX100 VII

The Sony RX100 VII (DSC-RX100M7) 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 3.94 DN, or 3.1 electrons at the sensor. From ISO 640 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 3200 don't change analog gain (digital push). Full well at base ISO is about 12,338 electrons; unity gain is around ISO 80.

Sony RX100 V vs Sony RX100 VII read noise table

ISO	Sony RX100 V	Sony RX100 VII
80	3.837	–
100	4.257	3.945
125	3.972	4.408
160	4.438	5.098
200	5.063	5.856
250	5.897	6.635
320	6.916	8.056
400	8.112	9.514
500	9.714	11.632
640	11.551	13.548
800	13.737	16.795
1000	16.679	20.535
1250	19.973	24.084
1600	24.251	29.651
2000	29.041	36.504
2500	35.506	45.887
3200	45.255	57.680
4000	56.493	70.035
5000	70.035	85.036
6400	80.449	103.250
8000	99.044	129.787
10000	126.238	160.898
12800	155.417	202.251

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