If you are planning to print/publish to a specific size, you need to be aware of how your camera's aspect ratio relates to that final size. Canon and Nikon's DSLRs currently have a 3:2 (width:height) sensor size ratio. Thus, an uncropped shot will make a perfect 4x6, 8x12, 16x24 ... (or any multiple of 3:2) print. A 5x7 print requires some cropping and an 8x10 requires even more cropping. This example crops very nicely to 5x7, but the cropping required for an 8x10 is a bit strong in my opinion.