Aspect ratio (image) - Wikipedia, the free encyclopedia
1 Practical limitations 2 Cinema terminology 2.1 Movie camera systems 3 Current video standards 3.1 4:3 standard 3.2 16:9 standard 3.3 21:9 4 Obtaining height, width, and area of the screen 5 Distinctions 6 Visual comparisons 7 Previous and currently used...