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  • Noise, low ISO sensitivities
  • Noise, high ISO sensitivities
  • Latitude
  • Noise, ISO 800
  • Noise, S95 vs. S100
  • Noise, ISO 1600, raw vs. JPEG
  • Noise, ISO 1600
  • HDR mode
  • Sharpness
  • Fringing
  • Lens distortion
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Canon PowerShot S100 photo samples

Noise, low ISO sensitivities

For a small camera, the S100 handles noise pretty well overall. JPEG photos are clean through ISO 200, and you can probably safely use ISO 400 if you don't mind some smeariness and artifacts in the out-of-focus regions. You can see that detail starts to degrade at about ISO 400 because the noise-reduction algorithm really kicks in there, and by ISO 800 it's a lot more obvious.
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Photo by: Matthew Fitzgerald/CNET

Noise, high ISO sensitivities

If you really need to use ISO 1600 or above, I strongly suggest you shoot raw.
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Photo by: Matthew Fitzgerald/CNET

Latitude

Any camera can have noise at low ISO sensitivities which will come out in low light conditions or if a shot's underexposed. What's important is how much flexibility you've got to improve the exposure without bringing out the noise. This isn't an egregiously dark shot, but you can see how bringing up the exposure starts to show a little color noise. I could probably have tweaked it a bit more with some time.

(1/80 sec, f2.0, ISO 80, evaluative metering, AWB, 4 inches away, 24mm; inset is the retouched shot.)
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Photo by: Lori Grunin/CNET

Noise, ISO 800

For a low-light scene like this, the PowerShot 100's JPEG noise-reduction algorithms do a pretty good job. You can see a bit of color noise on the whites of his eyes and some fuzziness on edges, but otherwise the photo is quite serviceable.

(1/25 sec, f2.0, ISO 800, evaluative metering, AWB, 24mm)
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Photo by: Lori Grunin/CNET

Noise, S95 vs. S100

Canon does seem to have improved its noise-reduction algorithms from the S95, although it's also possible the S100 just has a cleaner sensor. Whatever the reason, the S100's ISO 1600 shots look better than the S95's. That said, the S100 also seems to expose a little darker and slightly warmer than the S95.

(1/25 sec, f2.0, ISO 1600, evaluative metering, AWB, 24mm)
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Photo by: Lori Grunin/CNET

Noise, ISO 1600, raw vs. JPEG

Canon's noise-reduction algorithms remain some of the best I've seen--that is, you can do a little better at avoiding edge artifacts and sharpness loss by processing the raw files yourself, but only by making some tradeoffs with luminance grain.

(1/25 sec, f2.0, ISO 1600, evaluative metering, AWB, 24mm; raw processed using beta codec in Adobe Camera Raw.)
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Photo by: Lori Grunin/CNET

Noise, ISO 1600

As with many cameras, noise-reduction and compression artifacts tend to become exacerbated around the edges of the frame where lens distortion makes it difficult for them to work properly. This isn't unique to the S100, but because of the longer zoom range and wider angle of view, the lens has more distortion than the S95 and you're bound to notice it a little more.

(1/25 sec, f2.0, ISO 1600, evaluative metering, AWB, 24mm)
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Photo by: Lori Grunin/CNET

HDR mode

Canon's multishot HDR mode isn't very good for expanding the tonal range of a high-contrast scene: you really can't use it handheld and you simply don't know when it's safe to move the camera again because of the mystery final longer exposure length. On the other hand, it's kind of nifty to use for shooting traditional multiple exposures.
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Photo by: Lori Grunin/CNET

Sharpness

The lens delivers pretty sharp images, even at a higher ISO sensitivity, and without looking crunchy from oversharpening.

(1/50 sec, f4.0, ISO 400, spot metering, AWB, approx 49mm equivalent)
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Photo by: Lori Grunin/CNET

Fringing

Canon (like all camera manufactuers) obviously does in-camera defringing, but it clearly shows up in the raw files and it's not that easy to remove.

(1/30 sec, f2.5, ISO 80, evaluative metering, AWB, 24mm equivalent)
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Photo by: Lori Grunin/CNET

Lens distortion

While you can see some left-biased barrel distortion, this isn't bad for a 24mm lens. And as far as I can tell, it's not being corrected in-camera, since the raw files look the same (nor is there a menu option for it).
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Photo by: Lori Grunin/CNET

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