Many of my students have a huge interest in achieving beautiful blurs in camera, from background blurs with subjects in perfect focus, to creative and somewhat artistic blurs.
Something I've noticed is that people who are just discovering the beauty of photography believe that this blurriness is a complex effect that only pros can achieve, but after a few lessons about aperture, they quickly understand that is more of an optical behavior rather than an amazing secret.
When photographing a portrait, the most interesting thing in the frame is the person, and the background could present some degree of distraction. Therefore, blurring it out via focusing and fast apertures is an elegant way of resolving this intention.
Even the most boring background can become interesting if we view it with an unfocused lens. This technique is used for creating small circles of light from regular lights thanks to bokeh.
How Does Aperture Work When It Comes To Background Blur?
Background blur is something that comes along with photography, and mastering it requires practice because it is hard to pre-visualize blurriness. Background blur is really a cool technique to master, and it's quite easy to understand. So now get out there and practice!