Pentax Optio Z10 - 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 ISO setting has been reduced to let you see the full image, and below that 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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At the minimum 64 ISO the image quality is quite good.

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At just ISO 100 however there is some sign of image noise.

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Slightly more noise at ISO 200, with colour mottling in the lighter areas.

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At ISO 400 there is visible noise right across the image.

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At ISO 800 there appears to be less colour noise, but only because it is overwhelmed by the luminance noise and loss of saturation.

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Both chromatic and luminance noise at ISO 1600.

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Why bother having an ISO 3200 setting when the image quality is this poor?

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This is the full frame at ISO 3200.