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Canon Digital IXUS 70 - Test shots - ISO performance
A range of test shots are shown over the next few pages. Here, the full size image at the minimum ISO setting has 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 placed below it in order for you to gain an appreciation of the overall quality.
At the minimum setting of 80 ISO the image quality is superb, with no noise at all.
At 100 ISO there is still no noise.
Still all clear at 200 ISO.
Up one stop to 400 ISO and now there is visible noise in the darker area of the image, but little colour distortion.
At 800 ISO there is more luminance noise, but very little chromatic noise, as is often the case with Canon cameras.
At the maximum 1600 ISO, a lot of detail has been sacrificed to keep the colour distortion to a minimum, probably too much to get a decent print out of it.
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