Pentax Optio S4
4.0 megapixels (effective); 3x optical zoom/4x digital zoom; auto and manual focus; program exposure only; JPEG file format; ISO range 50-200; proprietary Lithium-Ion battery; movie mode with sound
The Pentax Optio S4 offers a compelling combination of ultra compact styling and 4-megapixel resolution. Like its predecessor, the popular Pentax Optio S, the Optio S4 is small enough to fit inside an Altoids tin -- which is exactly what many owners use as a camera case. Despite its small size, the Optio S4 offers 4-megapixel resolution and a 3x optical zoom, making it just as capable as cameras many times it size.