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Leica M-D (Typ 262) vs Leica M-E Typ 220: read noise comparison

Leica M-D (Typ 262)

The Leica M-D (Typ 262) was measured at 16 ISO settings from ISO 200 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 3.53 DN, or 10.4 electrons at the sensor. From ISO 250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 48,185 electrons; unity gain is around ISO 590.

Leica M-E Typ 220DxO

The Leica M-E Typ 220 was measured at 6 ISO settings from ISO 80 to ISO 2500. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (80) read noise is 8.17 DN. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Leica M-D (Typ 262) vs Leica M-E Typ 220 read noise table

ISOLeica M-D (Typ 262)Leica M-E Typ 220
80–8.168
2003.53110.928
2503.681–
3204.691–
4005.65716.912
5006.727–
6408.574–
80011.08135.017
100012.467–
125016.679–
160021.40789.884
200027.284–
250034.297147.033
320044.017–
400054.948–
500071.012–
640090.510–

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Data: Photons to Photos · © William J. Claff