aspect ratio http://www.adorama.com/alc/taginfo/aspect ratio Blog: How to Crop to HD in ACR, PSE, CS4 and LR3 Beta Video Tutorial.Our SLRs and compacts capture frames at 3:2 and 4:3 ratios, but HD is 16:9. Here's how to crop effectively. http://www.adorama.com/alc/blogarticle/12247 Article: What's an aspect ratio?.Why some print sizes cut off parts of your picture <p><span style="font-size: small;">Aspect ratio is the numerical relationship between the height of the image and its width, and is usually expressed with two numbers.</span></p> http://www.adorama.com/alc/article/8497