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

Input-referred read noise at base ISO: FujiFilm GFX 50R 3.3 e⁻ (ISO 100), FujiFilm GFX 50S 4.4 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

The FujiFilm GFX 50S 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 1.28 DN, or 4.4 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 56,105 electrons; unity gain is around ISO 340.

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

ISOFujiFilm GFX 50RFujiFilm GFX 50S
501.3471.275
1001.1171.283
1251.4141.537
1601.8401.853
2002.0421.945
2502.0422.329
3202.7892.828
4003.2273.434
5003.8644.170
6404.8575.098
8006.1056.105
10007.7277.516
12508.2829.126
16009.6469.383
20009.7819.448
25009.6469.383
32009.6469.580
40009.8499.580
50009.7149.514
64009.7149.514
80009.7819.580
100009.7819.383
128009.5809.580
2560077.17276.109
5120064.00063.119
10240064.00061.393

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Data: Photons to Photos · © William J. Claff