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FujiFilm GFX 50R vs FujiFilm GFX 50S II: read noise comparison

Input-referred read noise at base ISO: FujiFilm GFX 50R 3.3 e⁻ (ISO 100), FujiFilm GFX 50S II 2.9 e⁻ (ISO 100).

FujiFilm GFX 50R

The FujiFilm GFX 50R 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 1.12 DN, or 3.3 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 1250 don't change analog gain (digital push). Full well at base ISO is about 48,840 electrons; unity gain is around ISO 300.

FujiFilm GFX 50S II

The FujiFilm GFX 50S II 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 1.19 DN, or 2.9 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 39,910 electrons; unity gain is around ISO 240.

FujiFilm GFX 50R vs FujiFilm GFX 50S II read noise table

ISOFujiFilm GFX 50RFujiFilm GFX 50S II
501.3470.801
1001.1171.189
1251.4141.395
1601.8401.705
2002.0421.866
2502.0422.266
3202.7892.751
4003.2273.294
5003.8644.000
6404.8574.925
8006.1056.021
10007.7277.260
12508.2828.938
16009.64610.778
20009.78113.737
25009.64617.148
32009.64621.706
40009.84927.474
50009.71435.017
64009.71443.411
80009.78154.192
100009.78168.594
128009.58078.249
2560077.17280.449
5120064.00064.893
10240064.00065.799

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Data: Photons to Photos · © William J. Claff