Nikon D600 vs Nikon D610: read noise comparison

Input-referred read noise at base ISO: Nikon D600 4.1 e⁻ (ISO 100), Nikon D610 3.9 e⁻ (ISO 100).

Nikon D600

The Nikon D600 was measured at 26 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 0.86 DN, or 4.1 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 1600 don't change analog gain (digital push). Full well at base ISO is about 77,476 electrons; unity gain is around ISO 470.

Nikon D610

The Nikon D610 was measured at 26 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 0.86 DN, or 3.9 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 1600 don't change analog gain (digital push). Full well at base ISO is about 75,753 electrons; unity gain is around ISO 460.

Nikon D600 vs Nikon D610 read noise table

ISO	Nikon D600	Nikon D610
50	0.865	0.859
64	0.859	0.859
80	0.859	0.859
100	0.865	0.859
125	1.021	1.007
160	1.223	1.197
200	1.434	1.414
250	1.717	1.705
320	2.346	2.056
400	2.828	2.809
500	3.458	3.458
640	4.141	4.170
800	5.028	5.028
1000	6.063	6.063
1250	7.621	7.621
1600	9.580	9.849
2000	12.042	12.467
2500	15.032	15.671
3200	18.896	19.973
4000	23.752	24.933
5000	29.857	31.341
6400	37.792	39.947
8000	41.933	42.518
10000	52.346	53.076
12800	67.182	68.120
25600	133.436	135.298

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