How to Buy a Digital Photo Frame - Reviews by PC Magazine: "Rule 4: Select Your Aspect Ratio
Photo frames typically come in one of two aspect ratios, 4:3 or 15:9. By default, most point-and-shoot digital cameras capture photos in 4:3. A frame with an aspect ratio of 4:3 will be the best fit for your photos, as 15:9 frames will have to crop a piece of the top and bottom of your photos to fit the image on the LCD screen. On the other hand, a 15:9 aspect ratio gives your images a pleasing widescreen feel, which might be a better bet for some. One of our high-rated frames, the Sony DPF-V900 9-inch Digital Photo Frame, displays in 15:9. That, together with its slick design and intuitive software, makes it look and feel like a mini HDTV."