What should I do if I want to blur the background by taking a portrait with a super wide-angle head? Please give the lens and aperture scheme!

There are many methods, such as post-processing fuzzy background or something. . . . If you don't want to rely on software, open the aperture to the maximum focal length of 20, and then try to stick it to the subject with the nearest shooting distance, but the deformation will be more serious. The most convenient way is to change the aperture lens. . . . Wide-angle lens is difficult to make the aperture very large, mainly used to shoot blurred scenery. Wide-angle portraits are not wide-angle and will not make a fuss about blurring. It is better to focus on portraits with a large aperture and use the equipment in their hands.