Sony a7 V vs Sony a700: read noise comparison

Input-referred read noise at base ISO: Sony a7 V 2.4 e⁻ (ISO 100), Sony a700 6.3 e⁻ (ISO 200).

Sony a7 V

The Sony a7 V (ILCE-7M5) was measured at 37 ISO settings from ISO 50 to ISO 204800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 0.54 DN, or 2.4 electrons at the sensor. From ISO 1000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 51200 don't change analog gain (digital push). Full well at base ISO is about 71,138 electrons; unity gain is around ISO 450.

Sony a700

The Sony a700 (DSLR-A700) was measured at 19 ISO settings from ISO 100 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 1.28 DN, or 6.3 electrons at the sensor. From ISO 250 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 19,384 electrons; unity gain is around ISO 980.

Sony a7 V vs Sony a700 read noise table

ISO	Sony a7 V	Sony a700
50	0.536	–
64	0.586	–
80	0.664	–
100	0.536	1.021
125	0.595	1.338
160	0.678	1.495
200	0.722	1.283
250	0.865	1.505
320	1.094	1.840
400	1.231	2.329
500	1.516	2.713
640	1.959	3.605
800	2.514	4.317
1000	2.732	5.169
1250	3.340	6.821
1600	4.112	8.815
2000	5.242	10.196
2500	6.727	13.269
3200	8.282	17.030
4000	10.411	20.252
5000	12.729	26.355
6400	15.455	33.359
8000	19.562	–
10000	25.634	–
12800	31.559	–
16000	39.947	–
20000	49.867	–
25600	62.683	–
32000	78.249	–
40000	95.670	–
51200	117.784	–
64000	115.360	–
80000	140.070	–
102400	172.446	–
128000	218.275	–
160000	272.479	–
204800	342.509	–

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