Sony DSC-RX0 vs Sony DSC-RX10: read noise comparison

Input-referred read noise at base ISO: Sony DSC-RX0 3.6 e⁻ (ISO 125), Sony DSC-RX10 2.9 e⁻ (ISO 125).

Sony DSC-RX0

The Sony DSC-RX0 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 3.41 DN, or 3.6 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 16,280 electrons; unity gain is around ISO 130.

Sony DSC-RX10

The Sony DSC-RX10 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 3.84 DN, or 2.9 electrons at the sensor. From ISO 800 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 11,797 electrons; unity gain is around ISO 100.

Sony DSC-RX0 vs Sony DSC-RX10 read noise table

ISO	Sony DSC-RX0	Sony DSC-RX10
80	3.340	3.837
100	3.918	4.469
125	3.411	3.837
160	3.972	4.532
200	4.595	5.352
250	4.532	6.320
320	5.315	7.568
400	6.277	9.190
500	7.674	10.778
640	9.000	12.996
800	10.703	15.671
1000	13.086	18.896
1250	15.455	22.943
1600	19.160	28.246
2000	22.627	34.535
2500	26.538	42.518
3200	35.017	54.948
4000	44.324	67.649
5000	55.715	85.036
6400	70.035	84.449
8000	87.427	106.891
10000	112.206	136.239
12800	141.044	170.072

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