Canon PowerShot A590 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 a full-frame image at the minimum sensitivity of 80 ISO.

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Image quality at the lowest ISO setting is superb.

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At 100 ISO there is already some colour speckling visible.

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Image noise is noticeable at 200 ISO.

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At 400 ISO the noise is affecting the level of fine detail.

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Very significant noise problems at 800 ISO.

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At 1600 ISO the noise is so bad the image is virtually useless.

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This is the full frame at maximum ISO.

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