Pentax Optio T30 Review - Test shots – ISO performance Review

”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.”


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At the lowest setting of 64 ISO the picture quality is very good, with no trace of image noise.


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Likewise at 100 ISO the image is clean and smooth with good fine detail.


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There is very slight colour noise at 200 ISO but it is barely noticeable.


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Noise control is still very good at 400 ISO.


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At 800 ISO the colour noise is more obtrusive, and is joined by luminance noise as well, but the image is still usable.


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At 1600 ISO the image quality takes a big turn for the worse, but this is still just about printable.


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As is often the case, 3200 ISO is really just there for show, produces very poor results.


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