Leica M10 MONOCHROM vs Leica M10-P: read noise comparison

Input-referred read noise at base ISO: Leica M10 MONOCHROM 6.1 e⁻ (ISO 160), Leica M10-P 5.2 e⁻ (ISO 100).

Leica M10 MONOCHROM

The Leica M10 MONOCHROM was measured at 29 ISO settings from ISO 160 to ISO 102400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (160) read noise is 2.14 DN, or 6.1 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 46,751 electrons; unity gain is around ISO 450.

Leica M10-P

The Leica M10-P was measured at 7 ISO settings from ISO 100 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 1.97 DN, or 5.2 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 42,955 electrons; unity gain is around ISO 260.

Leica M10 MONOCHROM vs Leica M10-P read noise table

ISO	Leica M10 MONOCHROM	Leica M10-P
100	–	1.972
160	2.144	–
200	2.329	2.329
250	2.250	–
320	2.428	–
400	2.848	2.969
500	3.074	–
640	3.837	–
800	2.928	5.464
1000	3.655	–
1250	4.084	–
1600	4.891	10.056
2000	6.233	–
2500	7.568	–
3200	9.448	19.973
4000	11.632	–
5000	14.825	–
6400	18.507	40.224
8000	23.264	–
10000	29.446	–
12800	36.002	–
16000	44.942	–
20000	58.485	–
25600	72.004	–
32000	89.264	–
40000	121.938	–
51200	146.018	–
64000	176.069	–
80000	247.280	–
102400	296.112	–

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