To capture a great landscape image try using --ar 3:2, which is a common aspect ratio used in photography. You also have the option of using --ar 5:4, or for a widescreen look, give --ar 7:4 a try.

When Should You Crop an Image? ...

The aspect ratio states the comparison of width to height and is commonly used to describe the shape of a TV or computer screen. For example, the aspect ratio of an earlier standard-definition (SD ...