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Nikon Coolpix P340 vs Nikon Coolpix P7000: read noise comparison
Dual gain: Nikon Coolpix P340 ISO 12800, Nikon Coolpix P7000 none.
Nikon Coolpix P340DxO
The Nikon Coolpix P340 was measured at 9 ISO settings from ISO 80 to ISO 12800. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (80) read noise is 1.13 DN. A second gain (dual gain) kicks in at ISO 12800, cutting input-referred read noise by about 1.5 stop. Read noise keeps falling across the measured range, so the camera isn't fully ISO-invariant there.
Nikon Coolpix P7000DxO
The Nikon Coolpix P7000 was measured at 7 ISO settings from ISO 100 to ISO 6400. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (100) read noise is 9.51 DN. Read noise keeps falling across the measured range, so the camera isn't fully ISO-invariant there.
Nikon Coolpix P340 vs Nikon Coolpix P7000 read noise table
| ISO | Nikon Coolpix P340 | Nikon Coolpix P7000 |
|---|---|---|
| 80 | 1.125 | – |
| 100 | 1.434 | 9.514 |
| 200 | 2.639 | 18.126 |
| 400 | 4.028 | 35.261 |
| 800 | 8.112 | 72.505 |
| 1600 | 14.825 | 138.141 |
| 3200 | 28.443 | 215.269 |
| 6400 | 67.649 | 306.555 |
| 12800 | 48.168 | – |
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