Canon PowerShot SX1 IS - Test Shots - ISO Performance

Over the next few pages we show a range of test shots. On this page the full size image at the minimum and maximum ISO settings have been reduced to let you see the full image, and a series of full resolution crops have taken from original images at a range of ISO settings to show the overall image quality.

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This is the full frame at 80 ISO, the minimum setting.

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At 80 ISO the image quality is very good, with no visible noise, although there are some red fringes around the bright gold areas.

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Already at 100 ISO there is a little noise appearing in the mid-grey areas at the top left of this crop.

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At 200 ISO there are a couple of individual "hot pixels" showing, as well as a slight increase in overall noise.

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Noise reduction is stating to affect detail and colour fidelity at 400 ISO.

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Even more noise at 800 ISO, and image quality is fading fast.

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At 1600 ISO the image quality suddenly plunges.

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This is the full frame at 1600 ISO.

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