Pixii A1571 vs Pixii A3410: read noise comparison

The Pixii A1571 was measured at 10 ISO settings from ISO 80 to ISO 25600. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (80) read noise is 0.59 DN. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

The Pixii A3410 was measured at 18 ISO settings from ISO 80 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 0.54 DN, or 12.9 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 3200 don't change analog gain (digital push). Full well at base ISO is about 91,753 electrons; unity gain is around ISO 2390.