You’ll enhance a photo’s composition whenever you make sure to fill up its frame with your subject. To do this every time, sometimes you’ll need to use a zoom or a long lens, and sometimes you’ll need to step closer, but your pictures will speak more strongly, and your audience will know what they’re looking at.
The standard formats (height/width ratios, also called aspect ratios) for photographs have evolved over time. But some formats have proven over time that they’re best left untouched, and so camera makers stick with them. So let’s take a look at the most common aspect ratios for digital images—these ratios are also the ones produced by digital cameras, and photo labs and photo frame manufacturers expect them.