Optics and Resolution
The DSC-P51'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 features both a 2x optical zoom and a 3x digital zoom. Remember, however, that digital zoom tends to reduce the sharpness and detail of your image, so it's a good idea to use it sparingly. 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 be capturing, use the LCD display.

More Features
Though the P51 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 P51 uses two AA batteries--a pair of high-capacity nickel-metal hydride (NiMH) rechargeables and charger are included. The benefit to using standard AA batteries instead of a custom proprietary battery is that AA batteries are widely available, so missing a once-in-a-lifetime shot due to dead batteries won't be an issue. The downside is that a digital camera will kill a set of alkaline batteries extremely quickly, especially if you're using the camera's LCD display. To ensure you'll be ready for action, we recommend getting a second pair of batteries so you can always have one set in the camera and the other set in the charger.

Movie Mode
In movie mode, the camera captures silent video clips. Most digital cameras' movie modes are limited to 15- or 30-second clips, but in EX mode, the P51 can keep shooting until you've filled the memory card. The limited resolution of your movies guarantees that this feature won't replace your camcorder, but it's perfect for when you just want to capture a quick movie and e-mail it to a friend or relative.

Storage and Transfer
Images are stored on Memory Sticks, Sony's proprietary memory-card format. The included 16 MB stick holds approximately 24 images at the camera's default settings. Memory Sticks are reusable, but if you tend to take more than 24 images per outing, then you'll want a bigger card. A 128 MB stick is a great size for this camera, storing around 200 images. To transfer images to your computer, simply attach the included USB cable between your PC and your camera. Your computer should automatically recognize your camera and let you move the pictures to your hard drive. If you own a Sony desktop or laptop, your computer may already have a built-in Memory Stick reader.

Size
At 5 by 2.4 by 1.75 inches and 10.4 ounces fully loaded, the P51 is a very compact and portable digital camera.

Contents and Recommended Accessories
The package includes the DSC-P51 camera, two rechargeable NH-AA-D1 rechargeable batteries, BC-CS1 charger, video and USB cables, wrist strap, 16 MB Memory Stick, and software on CD.

Everything you need to get started is included in the box, but we recommend these accessories to make the most of your camera: a carrying case, a spare set of NiMH rechargeable size AA batteries, and a higher-capacity memory stick. Compatible accessories for this camera are listed near the top of this page.