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Compared to...

Below you will find a studio comparison between the Pentax Optio S5i and the similarly specified Panasonic Lumix DMC-FX7 at ISO 400.

Studio scene comparison (@ ISO 400)

  • Panasonic DMC-FX7: Program mode, ISO 400, Default Image Parameters,
    Manual white balance, +0.33 EV compensation
     
  • Pentax Optio S5i: Program mode, ISO 400, Default Image Parameters,
    Manual white balance, +0.67 EV compensation
     
  • Lighting: Two 800W studio lamps with dichroic daylight filters bounced off the ceiling
Pentax Optio S5i
Panasonic DMC-FX7
ISO 400, 1/10 sec, F4.4
ISO 400, 1/13 sec, F4.7
2,850 KB JPEG
1,769 KB JPEG
Noise, std dev: 3.6
Noise, std dev: 4.1

At ISO 400 there's little to choose between the two cameras - both show some noise, but it's a lot better than many similarly-specified competitors, and - in decent light - is not going to seriously mar normal sized prints. Again, the FX7 is capturing slightly more detail than the S5i, but does exhibit visibly more noise.

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