FujiFilm X100VI vs FujiFilm X30: read noise comparison

Input-referred read noise at base ISO: FujiFilm X100VI 2.5 e⁻ (ISO 125), FujiFilm X30 2.7 e⁻ (ISO 100).

FujiFilm X100VI

The FujiFilm X100VI was measured at 26 ISO settings from ISO 64 to ISO 51200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (125) read noise is 1.61 DN, or 2.5 electrons at the sensor. From ISO 2500 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 12800 don't change analog gain (digital push). Full well at base ISO is about 24,053 electrons; unity gain is around ISO 200.

FujiFilm X30

The FujiFilm X30 was measured at 14 ISO settings from ISO 100 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 1.06 DN, or 2.7 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 9,872 electrons; unity gain is around ISO 260.

FujiFilm X100VI vs FujiFilm X30 read noise table

ISO	FujiFilm X100VI	FujiFilm X30
64	1.625	–
80	1.959	–
100	2.346	1.057
125	1.613	–
160	1.972	–
200	2.362	1.853
250	2.789	2.266
320	3.531	2.848
400	4.408	3.458
500	3.074	4.112
640	3.891	5.063
800	4.925	6.277
1000	5.776	7.835
1250	7.413	9.849
1600	9.448	12.126
2000	11.472	14.825
2500	14.026	18.636
3200	16.450	23.425
4000	20.678	–
5000	26.723	–
6400	33.359	–
8000	41.643	–
10000	53.076	–
12800	60.969	–
25600	62.250	–
51200	61.393	–

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