Canon has today announced three new models in their affordable PowerShot A range. Slotting in at the entry-level, the PowerShot A450 and A460 replace the previous A420 and A430. Both sport 5.0 megapixel sensors and 3.2x / 4x zooms respectively. The A550 meanwhile enters the mid-range to supersede the A530, and offers a little more both in terms of features and control as well as increasing the pixel count to 7.1 million.

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