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8/10

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Canon IXUS 90 IS - Test Shots - ISO Performance

A range of test shots are shown over the next few pages. Here, the full size images at the minimum and maximum ISO settings have been reduced for bandwidth purposes to let you see the full image, and a series of crops taken from original full resolution images at a range of ISO settings have been included in order for you to gain an appreciation of the overall quality.
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/94/485db9/6f3c/7116-ISO80Resize.jpg

This is the full frame at 80 ISO

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/94/383a13/64ec/7116-80ISO.jpg
At 80 ISO the image is completely sharp and clean.

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/94/718b8e/88fa/7116-100ISO.jpg
There's no discernable difference at 100 ISO.

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/94/021176/8727/7116-200ISO.jpg
Pushing up to 200 ISO and the IXUS 90 IS still produces clean and detailed images.

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/94/a13013/9658/7116-400ISO.jpg
At 400 ISO some noise begins to creep in, but the result is still very respectable.

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/94/c358fe/a293/7116-800ISO.jpg
Things start to go south at 800 ISO, with noticable noise and loss of detail.

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/94/7ef312/774f/7116-1600ISO.jpg
At 1600 ISO the DIGIC III processor just can't cope with the amount of CCD noise intruding on the image. Detail is completely lost in low intensity areas, and the colour fidelity suffers considerably.

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/94/e27b43/79fd/7116-ISO1600resize.jpg
This is the full frame at 1600 ISO

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