FujiFilm X-E1 vs FujiFilm X-E2: read noise comparison

Input-referred read noise at base ISO: FujiFilm X-E1 5 e⁻ (ISO 200), FujiFilm X-E2 3.2 e⁻ (ISO 200).

FujiFilm X-E1

The FujiFilm X-E1 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 0.65 DN, or 5 electrons at the sensor. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 2500 don't change analog gain (digital push). Full well at base ISO is about 29,453 electrons; unity gain is around ISO 1530.

FujiFilm X-E2

The FujiFilm X-E2 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 1.55 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 2500 don't change analog gain (digital push). Full well at base ISO is about 31,926 electrons; unity gain is around ISO 420.

FujiFilm X-E1 vs FujiFilm X-E2 read noise table

ISO	FujiFilm X-E1	FujiFilm X-E2
200	0.646	1.548
250	0.727	1.828
320	0.829	2.219
400	0.993	2.676
500	1.133	3.272
640	1.385	3.972
800	1.670	4.891
1000	1.986	5.979
1250	2.428	7.413
1600	2.969	9.063
2000	3.758	11.236
2500	4.532	12.996
3200	4.438	12.906
4000	4.438	12.996
5000	4.532	12.996
6400	4.408	13.086

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