Nikon D610 vs Nikon D700: read noise comparison

Input-referred read noise at base ISO: Nikon D610 3.9 e⁻ (ISO 100), Nikon D700 15.7 e⁻ (ISO 200).

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 D700

The Nikon D700 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 4.69 DN, or 15.7 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 6400 don't change analog gain (digital push). Full well at base ISO is about 54,675 electrons; unity gain is around ISO 670.

Nikon D610 vs Nikon D700 read noise table

ISO	Nikon D610	Nikon D700
50	0.859	–
64	0.859	–
80	0.859	–
100	0.859	4.691
125	1.007	4.691
160	1.197	4.691
200	1.414	4.691
250	1.705	5.856
320	2.056	7.260
400	2.809	5.242
500	3.458	6.543
640	4.170	8.456
800	5.028	6.543
1000	6.063	8.515
1250	7.621	10.853
1600	9.849	13.929
2000	12.467	17.388
2500	15.671	21.706
3200	19.973	27.284
4000	24.933	34.535
5000	31.341	43.411
6400	39.947	55.330
8000	42.518	69.071
10000	53.076	87.427
12800	68.120	110.661
25600	135.298	221.322

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