Nikon D7000 vs Nikon D7100: read noise comparison

Input-referred read noise at base ISO: Nikon D7000 3.1 e⁻ (ISO 100), Nikon D7100 2.7 e⁻ (ISO 100).

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 D7100

The Nikon D7100 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 1.24 DN, or 2.7 electrons at the sensor. From ISO 100 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 35,974 electrons; unity gain is around ISO 220.

Nikon D7000 vs Nikon D7100 read noise table

ISO	Nikon D7000	Nikon D7100
100	1.257	1.240
125	1.526	1.693
160	1.840	1.972
200	2.378	2.549
250	3.031	3.317
320	3.681	4.228
400	4.438	4.790
500	5.315	6.063
640	6.543	7.781
800	8.112	9.254
1000	10.126	11.551
1250	12.729	14.723
1600	16.000	18.507
2000	20.252	23.425
2500	25.457	29.446
3200	32.000	36.758
4000	40.504	46.206
5000	50.914	58.081
6400	64.000	73.009
8000	81.008	49.522
10000	101.829	62.250
12800	128.000	78.793
25600	256.000	155.417

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