Nikon D7000 vs Nikon D70s: read noise comparison

Input-referred read noise at base ISO: Nikon D7000 3.1 e⁻ (ISO 100), Nikon D70s 16.1 e⁻ (ISO 200).

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 D70s

The Nikon D70s 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 3.36 DN, or 16.1 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 vs Nikon D70s read noise table

ISO	Nikon D7000	Nikon D70s
100	1.257	–
125	1.526	–
160	1.840	–
200	2.378	3.364
250	3.031	4.056
320	3.681	4.790
400	4.438	5.816
500	5.315	7.260
640	6.543	9.126
800	8.112	11.392
1000	10.126	13.548
1250	12.729	16.223
1600	16.000	19.698
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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