Pentax K-m DSLR - 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. These ISO test images are shot indoors using reflected natural light for maximum consistency.

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This is the full frame at 100 ISO, the minimum setting. The K-m can be set to 1/3 EV ISO settings, but we're just showing the whole-stop settings here for brevity.

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The image quality is excellent at 100 ISO, although the default JPEG setting is a bit over-saturated.

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Still very good at 200 ISO.

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Still very good at 400 ISO.

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There is a little shadow noise at 800 ISO, but the image is quite printable.

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Some shadow detail has been lost at 1600 ISO, but colour balance and exposure are still good.

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Definitely a bit noisy at 3200 ISO, but even this would be OK for small prints or web images.

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This is the full frame at 3200 ISO.

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