Nikon D700 vs Nikon D7000: read noise comparison

Input-referred read noise at base ISO: Nikon D700 15.7 e⁻ (ISO 200), Nikon D7000 3.1 e⁻ (ISO 100).

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 D7000

The Nikon D7000 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 (100) read noise is 1.26 DN, or 3.1 electrons at the sensor. From ISO 320 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 1000 don't change analog gain (digital push). Full well at base ISO is about 40,093 electrons; unity gain is around ISO 240.

Nikon D700 vs Nikon D7000 read noise table

ISO	Nikon D700	Nikon D7000
100	4.691	1.257
125	4.691	1.526
160	4.691	1.840
200	4.691	2.378
250	5.856	3.031
320	7.260	3.681
400	5.242	4.438
500	6.543	5.315
640	8.456	6.543
800	6.543	8.112
1000	8.515	10.126
1250	10.853	12.729
1600	13.929	16.000
2000	17.388	20.252
2500	21.706	25.457
3200	27.284	32.000
4000	34.535	40.504
5000	43.411	50.914
6400	55.330	64.000
8000	69.071	81.008
10000	87.427	101.829
12800	110.661	128.000
25600	221.322	256.000

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