Sony has enhanced and updated the design of its new Cyber-shot DSC-S750 and DSC-S780 digital still camera models.

Both of the new entry-level digital still cameras now feature Sony's face detection technology, which identifies up to three faces and automatically adjusts focus and exposure.

Sony has also upgraded the two models' power source to Lithium Ion batteries, instead of AA batteries, to extend battery life and allow for a slimmer body design.

The DSC-S780 and DSC-S750 cameras can capture up to 270 and 280 shots on a single full charge, respectively.

The 8.1-megapixel DSC-S780 and the 7.2-megapixel DSC-S750 models incorporate CCD imagers, 3x optical zoom lenses, and 2.5-inch LCD screens.

Other features include seven scene selections, five-point autofocus, 22MB of internal memory and higher sensitivity settings of up to IS0 1250.

Available in classic silver, the DSC-S750 model ships in March for about $150, and the DSC-S780 will be available in April for about $180.

In Europe, the Cyber-shot S750 and S780 will be available from end February and end March 2008 respectively, no pricing details revealed.