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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.
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.
The image quality is excellent at 100 ISO, although the default JPEG setting is a bit over-saturated.
Still very good at 200 ISO.
Still very good at 400 ISO.
There is a little shadow noise at 800 ISO, but the image is quite printable.
Some shadow detail has been lost at 1600 ISO, but colour balance and exposure are still good.
Definitely a bit noisy at 3200 ISO, but even this would be OK for small prints or web images.
This is the full frame at 3200 ISO.
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