Nikon D70 vs Nikon D7000: read noise comparison

Input-referred read noise at base ISO: Nikon D70 15.4 e⁻ (ISO 200), Nikon D7000 3.1 e⁻ (ISO 100).

Nikon D70

The Nikon D70 was measured at 10 ISO settings from ISO 200 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 3.20 DN, or 15.4 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 800 don't change analog gain (digital push). Full well at base ISO is about 19,646 electrons; unity gain is around ISO 960.

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 D70 vs Nikon D7000 read noise table

ISO	Nikon D70	Nikon D7000
100	–	1.257
125	–	1.526
160	–	1.840
200	3.204	2.378
250	3.864	3.031
320	4.627	3.681
400	5.736	4.438
500	7.013	5.315
640	8.877	6.543
800	11.004	8.112
1000	13.454	10.126
1250	16.111	12.729
1600	19.427	16.000
2000	–	20.252
2500	–	25.457
3200	–	32.000
4000	–	40.504
5000	–	50.914
6400	–	64.000
8000	–	81.008
10000	–	101.829
12800	–	128.000
25600	–	256.000

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