Olympus E-500 vs Olympus E-520: read noise comparison
Input-referred read noise at base ISO: Olympus E-500 14.6 e⁻ (ISO 100), Olympus E-520 17.2 e⁻ (ISO 100).
Olympus E-500
The Olympus E-500 was measured at 13 ISO settings from ISO 100 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 2.08 DN, or 14.6 electrons at the sensor. From ISO 100 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 28,297 electrons; unity gain is around ISO 700.
Olympus E-520
The Olympus E-520 was measured at 5 ISO settings from ISO 100 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 3.25 DN, or 17.2 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 21,393 electrons; unity gain is around ISO 530.
Olympus E-500 vs Olympus E-520 read noise table
| ISO | Olympus E-500 | Olympus E-520 |
|---|---|---|
| 100 | 2.085 | 3.249 |
| 125 | 2.479 | – |
| 160 | 3.095 | – |
| 200 | 3.972 | 5.242 |
| 250 | 5.028 | – |
| 320 | 6.364 | – |
| 400 | 8.056 | 6.635 |
| 500 | 10.056 | – |
| 640 | 12.817 | – |
| 800 | 16.223 | 13.454 |
| 1000 | 20.393 | – |
| 1250 | 25.281 | – |
| 1600 | 31.125 | 28.443 |
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