Sony RX100 IV vs Sony RX100 VI: read noise comparison

Input-referred read noise at base ISO: Sony RX100 IV 2.8 e⁻ (ISO 125), Sony RX100 VI 3.2 e⁻ (ISO 125).

Sony RX100 IV

The Sony RX100 IV (DSC-RX100M4) 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 3.25 DN, or 2.8 electrons at the sensor. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 13,145 electrons; unity gain is around ISO 110.

Sony RX100 VI

The Sony RX100 VI (DSC-RX100M6) 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 4.11 DN, or 3.2 electrons at the sensor. From ISO 1000 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 11,975 electrons; unity gain is around ISO 100.

Sony RX100 IV vs Sony RX100 VI read noise table

ISO	Sony RX100 IV	Sony RX100 VI
80	3.249	4.170
100	3.758	4.659
125	3.249	4.112
160	3.732	4.691
200	4.347	5.389
250	5.242	6.320
320	6.148	7.413
400	7.362	8.938
500	8.815	10.411
640	10.556	12.641
800	12.906	15.242
1000	15.242	17.877
1250	18.636	22.316
1600	22.316	27.096
2000	27.096	31.779
2500	32.900	40.504
3200	42.224	50.563
4000	52.710	59.714
5000	66.718	73.517
6400	67.182	89.264
8000	84.449	112.206
10000	106.891	140.070
12800	135.298	177.294

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