Sony a6300 vs Sony a65: read noise comparison

Input-referred read noise at base ISO: Sony a6300 3.9 e⁻ (ISO 100), Sony a65 3.9 e⁻ (ISO 100).

Dual gain: Sony a6300 ISO 400, Sony a65 none.

Sony a6300

The Sony a6300 (ILCE-6300) was measured at 28 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 1.61 DN, or 3.9 electrons at the sensor. A second gain (dual gain) kicks in at ISO 400, cutting input-referred read noise by about 1.1 stop. From ISO 1000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 5000 don't change analog gain (digital push). Full well at base ISO is about 38,355 electrons; unity gain is around ISO 240.

Sony a65

The Sony a65 (SLT-A65V) was measured at 9 ISO settings from ISO 100 to ISO 16000. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 3.39 DN, or 3.9 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 3200 don't change analog gain (digital push). Full well at base ISO is about 18,205 electrons; unity gain is around ISO 110.

Sony a6300 vs Sony a65 read noise table

ISO	Sony a6300	Sony a65
100	1.613	3.387
125	1.892	–
160	2.266	–
200	2.751	5.736
250	3.294	–
320	3.945	–
400	2.282	9.714
500	2.676	–
640	3.249	–
800	3.945	17.877
1000	4.823	–
1250	5.979	–
1600	7.311	36.002
2000	9.126	–
2500	11.236	–
3200	13.929	72.505
4000	17.268	–
5000	20.821	–
6400	21.259	112.206
8000	28.051	–
10000	33.359	–
12800	29.041	224.411
16000	36.758	278.204
20000	44.942	–
25600	57.282	–
32000	73.009	–
40000	91.773	–
51200	113.772	–

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