Compact point-and-shoot cameras have a built-in lens that typically gives you an optical zoom with a variable aperture and small sensor. What this means is that while you might have the ability to shoot both wide and telephoto zoom lengths, you don’t have as much control over selective focus or shallow-depth-of-field techniques. Selective focus, often accentuated by pronounced bokeh, is one of the first things that people notice about photos taken with larger sensor, interchangeable-lens cameras, because now you have the option to shoot with a long zoom lens with an f/2.8 aperture, or a prime portrait lens with an f/1.4 aperture.