Optics and Resolution
The DSC-P31's 2-megapixel sensor captures enough detail for sharp prints at sizes up to 8 by 10 inches. For the typical family photographer, 2 megapixels is a great balance between price and performance. If you want a camera with even more resolution, you'll need to step up to a 3- or 4-megapixel model like the DSC-P71 or DSC-P9.

The autofocus lens does not have a true optical zoom, but a 2x digital zoom (6x total) works in much the same way. Remember, however, that digital zoom tends to reduce the sharpness and detail of your image, so it's not as useful as a true zoom lens. In low-light situations (a particular weakness for many digital cameras), a focus-assist lamp sends out a small patterned beam to help the camera accurately determine distance, and special circuitry automatically reduces the "static" that typically plagues nighttime digital shots.

To compose your images, either use the traditional camera viewfinder or the 1.6-inch LCD display (which is also used to review the shots you've taken). Having both types of viewfinders offers the best of both worlds: if you're used to using a film camera or want to conserve battery life, use the viewfinder. If you want to see exactly the picture you'll capture, use the LCD display.

More Features
Though the P31 is designed for point-and-shoot simplicity, there are several options for more adventurous photographers, including manual focus with macro, adjustable ISO and white balance settings, exposure compensation, and the ability to shoot black-and-white, sepia, solarized, and negative images.

Power
The P31 uses two AA batteries--a pair of high-capacity nickel-metal hydride (NiMH) rechargeables and charger are included. The ben