Canon EOS 7D vs Canon EOS 7D Mark II: read noise comparison

Input-referred read noise at base ISO: Canon EOS 7D 12 e⁻ (ISO 100), Canon EOS 7D Mark II 13.8 e⁻ (ISO 100).

Canon EOS 7D

The Canon EOS 7D was measured at 20 ISO settings from ISO 100 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 6.45 DN, or 12 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 3200 don't change analog gain (digital push). Full well at base ISO is about 26,690 electrons; unity gain is around ISO 190.

Canon EOS 7D Mark II

The Canon EOS 7D Mark II was measured at 25 ISO settings from ISO 100 to ISO 51200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 5.70 DN, or 13.8 electrons at the sensor. From ISO 4000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 16000 don't change analog gain (digital push). Full well at base ISO is about 34,937 electrons; unity gain is around ISO 240.

Canon EOS 7D vs Canon EOS 7D Mark II read noise table

ISO	Canon EOS 7D	Canon EOS 7D Mark II
100	6.453	5.696
125	8.168	7.062
160	5.657	4.891
200	7.111	6.148
250	9.126	7.674
320	8.000	5.938
400	9.987	7.362
500	12.295	9.190
640	12.553	8.056
800	15.562	9.987
1000	19.027	12.467
1250	21.407	12.042
1600	26.723	15.780
2000	34.535	19.160
2500	39.124	19.160
3200	49.180	24.590
4000	56.103	29.446
5000	66.257	33.359
6400	79.341	41.070
8000	–	50.563
10000	–	63.558
12800	143.013	79.893
16000	–	100.427
25600	–	155.417
51200	–	280.139

Popular comparisons

All cameras · Open the full tool