What is aspect ratio?

The Aspect Ratio of an image is the width divided by the height and are expressed as x:y.

The most common today are 1.33:1 also known as 4:3, TV format and 1.77:1, commonly expressed as 16:9 or HDTV which are found in both projectors and computer monitors. Even wider formats such as 2.35:1 are also used in feature films. We supply both 4:3 and 16:9 projectors and screens as well as 2.35:1 and custom screen sizes.