Pentax Optio E40 - Test shots – ISO performance

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”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 the minimum ISO setting.


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If you look at the upper part of this shot, you’ll see image noise even at the ISO 80 setting.


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Noise is noticeably worse at ISO 160.


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Progressively more noise at ISO 320.


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Not much worse at ISO 400, but then it’s only 1/3rd of a stop higher.


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A sudden dip in quality at ISO 800.


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At ISO 1000 the image quality is very poor.


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This is the full frame at the maximum ISO setting.


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