FujiFilm X-E5 vs FujiFilm X-H2: read noise comparison

Input-referred read noise at base ISO: FujiFilm X-E5 2.5 e⁻ (ISO 125), FujiFilm X-H2 2.7 e⁻ (ISO 125).

FujiFilm X-E5

The FujiFilm X-E5 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 1.67 DN, or 2.5 electrons at the sensor. From ISO 1250 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 22,879 electrons; unity gain is around ISO 190.

FujiFilm X-H2

The FujiFilm X-H2 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 1.71 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 10000 don't change analog gain (digital push). Full well at base ISO is about 23,893 electrons; unity gain is around ISO 200.

FujiFilm X-E5 vs FujiFilm X-H2 read noise table

ISO	FujiFilm X-E5	FujiFilm X-H2
64	1.741	1.682
80	2.000	2.042
100	2.532	2.445
125	1.670	1.705
160	2.042	2.071
200	2.462	2.497
250	3.031	3.053
320	3.706	3.732
400	4.595	4.659
500	3.272	3.340
640	4.141	4.141
800	5.352	5.134
1000	6.589	6.277
1250	7.945	7.890
1600	9.918	9.714
2000	12.295	12.467
2500	15.242	15.032
3200	19.027	19.160
4000	22.943	22.627
5000	29.857	29.041
6400	37.271	37.792
8000	48.840	47.505
10000	60.969	59.302
12800	68.120	65.345
25600	69.071	64.445
51200	66.257	65.799

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