Nikon D7100 vs Nikon D7200: read noise comparison

Input-referred read noise at base ISO: Nikon D7100 2.7 e⁻ (ISO 100), Nikon D7200 2 e⁻ (ISO 100).

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 D7200

The Nikon D7200 was measured at 25 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 0.90 DN, or 2 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 8000 don't change analog gain (digital push). Full well at base ISO is about 34,991 electrons; unity gain is around ISO 220.

Nikon D7100 vs Nikon D7200 read noise table

ISO	Nikon D7100	Nikon D7200
100	1.240	0.901
125	1.693	1.197
160	1.972	1.537
200	2.549	1.495
250	3.317	2.129
320	4.228	2.532
400	4.790	2.639
500	6.063	3.555
640	7.781	4.377
800	9.254	5.098
1000	11.551	6.635
1250	14.723	8.282
1600	18.507	10.056
2000	23.425	12.996
2500	29.446	15.889
3200	36.758	19.973
4000	46.206	24.761
5000	58.081	31.559
6400	73.009	39.671
8000	49.522	50.213
10000	62.250	62.250
12800	78.793	76.109
16000	–	96.336
20000	–	122.786
25600	155.417	153.277

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