FujiFilm GFX 100 II vs Hasselblad X2D-100c: read noise comparison

Input-referred read noise at base ISO: FujiFilm GFX 100 II 2.5 e⁻ (ISO 80), Hasselblad X2D-100c 2.8 e⁻ (ISO 64).

Dual gain: FujiFilm GFX 100 II ISO 500, Hasselblad X2D-100c none.

FujiFilm GFX 100 II

The FujiFilm GFX 100 II was measured at 27 ISO settings from ISO 40 to ISO 102400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (80) read noise is 3.07 DN, or 2.5 electrons at the sensor. A second gain (dual gain) kicks in at ISO 500, cutting input-referred read noise by about 1.4 stop. From ISO 1600 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 53,625 electrons; unity gain is around ISO 70.

Hasselblad X2D-100c

The Hasselblad X2D-100c was measured at 10 ISO settings from ISO 64 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (64) read noise is 3.97 DN, or 2.8 electrons at the sensor. From ISO 200 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 34,682 electrons; unity gain is around ISO 50.

FujiFilm GFX 100 II vs Hasselblad X2D-100c read noise table

ISO	FujiFilm GFX 100 II	Hasselblad X2D-100c
40	3.272	–
64	–	3.972
80	3.074	–
100	5.205	6.233
125	6.498	–
160	7.568	–
200	9.000	5.464
250	11.236	–
320	13.737	–
400	17.630	10.629
500	8.282	–
640	9.918	–
800	12.641	20.535
1000	15.242	–
1250	20.393	–
1600	23.752	39.671
2000	29.041	–
2500	37.014	–
3200	44.017	78.793
4000	57.680	–
5000	70.035	–
6400	85.036	158.683
8000	106.891	–
10000	133.436	–
12800	172.446	312.996
25600	235.568	568.100
51200	249.000	–
102400	265.028	–

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