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Olympus OM-D E-M10 vs Olympus OM-D E-M10 Mark II: read noise comparison

Input-referred read noise at base ISO: Olympus OM-D E-M10 6.9 e⁻ (ISO 200), Olympus OM-D E-M10 Mark II 6.3 e⁻ (ISO 200).

Olympus OM-D E-M10

The Olympus OM-D E-M10 was measured at 23 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 1.15 DN, or 6.9 electrons at the sensor. From ISO 800 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 23,059 electrons; unity gain is around ISO 1200.

Olympus OM-D E-M10 Mark II

The Olympus OM-D E-M10 Mark II was measured at 23 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 0.97 DN, or 6.3 electrons at the sensor. From ISO 800 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 24,773 electrons; unity gain is around ISO 1290.

Olympus OM-D E-M10 vs Olympus OM-D E-M10 Mark II read noise table

ISO	Olympus OM-D E-M10	Olympus OM-D E-M10 Mark II
100	1.266	0.979
200	1.149	0.973
250	1.347	1.149
320	1.602	1.338
400	1.292	1.072
500	1.526	1.283
640	1.828	1.526
800	2.219	1.866
1000	2.713	2.282
1250	3.294	2.751
1600	4.112	3.411
2000	5.098	4.199
2500	6.277	5.134
3200	7.890	6.409
4000	9.714	8.056
5000	12.126	10.126
6400	15.242	13.086
8000	19.160	16.111
10000	23.918	20.252
12800	30.065	25.992
16000	38.055	32.447
20000	47.177	40.504
25600	58.081	50.914

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