Optics and Resolution
The CD400's 4-megapixel sensor captures a tremendous amount of detail, allowing sharp 11-by-14-inch prints with pixels to spare. If you're currently using a high-quality 35mm point-and-shoot, expect to see as much detail in your digital pictures as you currently see in your film photos.

A 3x Carl Zeiss optical zoom lens (34-102mm equivalent) helps you to capture exactly the picture you want, and an additional 2x digital zoom (6x total) further magnifies your image. Remember, however, that digital zoom tends to reduce the sharpness and detail of your image, so it's best used 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.

To save space, there's no traditional optical viewfinder to look through. Instead, to compose your images or review shots you've already taken, the CD400 uses a 2.5-inch color display. The advantage to using the LCD to frame your shots is that the screen lets you see exactly the picture you'll capture. The disadvantage is that you can't turn off the screen and just use the optical viewfinder to extend battery life. Fortunately, the included rechargeable battery holds a relatively good charge.

More Features
The engineers at Sony have gone out of their way to make it as easy as possible to share your images online. For example, the e-mail mode stores a lower-resolution version of your picture on the disc in a separate folder from the full-size version. This compact file lacks the detail of the original, but has a small file size,