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FujiFilm FinePix XF1 vs FujiFilm GFX 100: read noise comparison

FujiFilm FinePix XF1DxO

The FujiFilm FinePix XF1 was measured at 6 ISO settings from ISO 100 to ISO 3200. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (100) read noise is 1.83 DN. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

FujiFilm GFX 100

The FujiFilm GFX 100 was measured at 26 ISO settings from ISO 50 to ISO 102400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 5.39 DN, or 3.4 electrons at the sensor. From ISO 2000 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 41,534 electrons; unity gain is around ISO 60.

FujiFilm FinePix XF1 vs FujiFilm GFX 100 read noise table

ISOFujiFilm FinePix XF1FujiFilm GFX 100
50–3.580
1001.8285.389
125–6.635
160–8.112
2002.4128.398
250–10.126
320–12.906
4004.99315.780
500–10.056
640–12.042
8008.28214.723
1000–18.507
1250–23.588
160016.56429.243
2000–35.753
2500–43.411
320039.12453.076
4000–66.257
5000–83.286
6400–103.250
8000–133.436
10000–162.017
12800–191.341
25600–282.088
51200–308.687
102400–304.437

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Data: Photons to Photos · © William J. Claff