Sony Alpha A330 - Test Shots – ISO Performance

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”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 pictures were taken indoors using reflected natural light. ”


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This is the full frame at 100 ISO. The shot is slightly over-exposed, because apparently the A330 takes the exposure reading before starting the self-timer countdown.


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Over-exposure or not, there is no visible image noise at 100 ISO.


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Still very smooth at 200 ISO.


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At 400 ISO there is visible colour noise and some loss of fine detail.


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At 800 ISO the colour gradient on the side of the red car is looking very rough.


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1600 ISO is too noisy for serious work, but would be OK for small prints.


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The same goes for 3200 ISO.


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The full frame at 3200 ISO


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