FujiFilm X100VI vs FujiFilm XF10: read noise comparison

Input-referred read noise at base ISO: FujiFilm X100VI 2.5 e⁻ (ISO 125), FujiFilm XF10 2.8 e⁻ (ISO 200).

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 XF10

The FujiFilm XF10 was measured at 19 ISO settings from ISO 200 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 1.84 DN, or 2.8 electrons at the sensor. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 23,328 electrons; unity gain is around ISO 300.

FujiFilm X100VI vs FujiFilm XF10 read noise table

ISO	FujiFilm X100VI	FujiFilm XF10
64	1.625	–
80	1.959	–
100	2.346	–
125	1.613	–
160	1.972	–
200	2.362	1.840
250	2.789	2.158
320	3.531	2.657
400	4.408	3.182
500	3.074	3.891
640	3.891	4.724
800	4.925	5.776
1000	5.776	7.111
1250	7.413	8.694
1600	9.448	10.556
2000	11.472	12.996
2500	14.026	16.223
3200	16.450	20.678
4000	20.678	24.590
5000	26.723	31.125
6400	33.359	38.854
8000	41.643	50.213
10000	53.076	63.119
12800	60.969	79.893
25600	62.250	–
51200	61.393	–

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