In the review of the Sony A330, Philip Ryan issued the following statement on the A330’s image quality:
Typical of DSLRs these days, the A330 got an Excellent rating in our color accuracy test. With an average Delta E of 7.11, it handily beat our cutoff of 8 or below for top honors. As have previous entry-level Sonys, the A330 also scored quite well in noise control. Using the manufacturer’s RAW converter (Image Data Converter SR), and with the default level of noise reduction applied, it never rose above a Moderately Low noise rating. That’s two steps above the bottom rung on our scale.
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Given the resolution, the A330 scores a Very High rating for overall image quality from ISO 100 through 400, pulled up a bit by its Excellent color accuracy and Very Low or better noise in that range. From ISO 800 through ISO 3200, overall image quality was High.