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Pentax Optio E40 - 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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/94/2d6a1e/4161/5729-PentaxE40ISOmin.jpg

This is the full frame at the minimum ISO setting.

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/94/5e46bc/e590/5729-PentaxE40ISO80.jpg

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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/94/90afb8/7453/5729-PentaxE40ISO160.jpg

Noise is noticeably worse at ISO 160.

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/94/27a465/a4b8/5729-PentaxE40ISO320.jpg

Progressively more noise at ISO 320.

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/94/35b234/202e/5729-PentaxE40ISO400.jpg

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

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/94/022a74/5057/5729-PentaxE40ISO800.jpg

A sudden dip in quality at ISO 800.

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/94/5bf3ab/8712/5729-PentaxE40ISO1000.jpg

At ISO 1000 the image quality is very poor.

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/94/6d4945/a8f4/5729-PentaxE40ISOmax.jpg

This is the full frame at the maximum ISO setting.

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