FujiFilm X70 vs FujiFilm XF10: read noise comparison

Input-referred read noise at base ISO: FujiFilm X70 2.7 e⁻ (ISO 200), FujiFilm XF10 2.8 e⁻ (ISO 200).

FujiFilm X70

The FujiFilm X70 was measured at 16 ISO settings from ISO 200 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 1.47 DN, or 2.7 electrons at the sensor. From ISO 500 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 2000 don't change analog gain (digital push). Full well at base ISO is about 27,744 electrons; unity gain is around ISO 360.

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 X70 vs FujiFilm XF10 read noise table

ISO	FujiFilm X70	FujiFilm XF10
200	1.474	1.840
250	1.778	2.158
320	2.158	2.657
400	2.621	3.182
500	3.204	3.891
640	3.918	4.724
800	4.790	5.776
1000	6.021	7.111
1250	7.260	8.694
1600	8.815	10.556
2000	10.928	12.996
2500	12.553	16.223
3200	12.641	20.678
4000	12.729	24.590
5000	12.553	31.125
6400	12.467	38.854
8000	–	50.213
10000	–	63.119
12800	–	79.893

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