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Sony a230 vs Sony a300: read noise comparison

Sony a230DxO

The Sony a230 (DSLR-A230) was measured at 6 ISO settings from ISO 100 to ISO 3200. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (100) read noise is 1.69 DN. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Sony a300DxO

The Sony a300 (DSLR-A300) was measured at 6 ISO settings from ISO 100 to ISO 3200. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (100) read noise is 1.73 DN. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Sony a230 vs Sony a300 read noise table

ISOSony a230Sony a300
1001.6931.729
2003.0952.868
4005.8166.063
80010.77811.314
160022.31621.259
320044.32439.397

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Data: Photons to Photos · © William J. Claff