You can choose the image aspect ratio when you take a picture on your iPhone, so does that mean you’re stuck with it?

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.

The GoPro Hero 4K action camera is getting a new 4:3 video recording upgrade that utilises the sensor's full height and width. This new video setting can be updated via the GoPro Quik app.

You see, he’s a bit of an aspect ratio nerd. Only a proper 4:3 screen would do for emulating games designed for just such a display. Modern 4:3 displays are hard to come by, unless of course you ...