alpereninyeri
TREN

Phase One IQ180 vs Phase One IQ4 150MP: read noise comparison

Phase One IQ180DxO

The Phase One IQ180 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 16.56 DN. From ISO 100 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Phase One IQ4 150MP

The Phase One IQ4 150MP was measured at 28 ISO settings from ISO 50 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 4.17 DN, or 3.5 electrons at the sensor. From ISO 20000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 54,029 electrons; unity gain is around ISO 80.

Phase One IQ180 vs Phase One IQ4 150MP read noise table

ISOPhase One IQ180Phase One IQ4 150MP
50–4.199
64–4.141
80–4.056
10016.5644.170
125–4.112
160–4.199
20033.5917.568
250–7.674
320–7.727
40072.5056.821
500–6.727
640–7.062
800143.01312.906
1000–13.642
1250–13.361
1600418.76625.813
2000–26.173
2500–25.634
32001,192.68750.213
4000–49.867
5000–49.522
6400–95.670
8000–103.250
10000–97.006
12800–181.019
16000–177.294
20000–184.823
25600–372.217

Popular comparisons

All cameras · Open the full tool

Alperen Kılıç · Read Noise

Data: Photons to Photos · © William J. Claff