For example, the aspect ratio of an earlier standard-definition (SD) screen was 4:3, which is a relatively square rectangle. The 4:3 means "4 to 3," or four units wide to three units high.
So if you choose an aspect ratio and then shoot, the Camera app will crop the scene to that shape. Does that mean you’re stuck with it and you can’t change it later? No! The iPhone’s sensor ...
Each of the following resolutions is also an entry in this encyclopedia. See resolution and aspect ratio. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.