PCinsight has posted a review on the HP Photosmart 315 Digital Camera.

Perhaps the greatest cost-cutting measure used with this camera would be its limited zoom capabilities. Offering no optical zoom (the preferred method of zooming, as it maintains full image quality), the camera instead relies on a 2.5x digital zoom capability. Take note however, as HP is definately not alone in this regard. With only a few exceptions, most cameras priced around $300 lack this same ability. Even still, if HP had been able to cram an optical zoom lens into the unit, while maintaining it´s already-low price, it would have been icing on the cake.

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