Photography problem! ! ! Out of focus! ! !

Out-of-focus means that the focus is not completed or failed.

Have you ever seen a photo with a blurred background? The blurred background is blurred because it is in Jiao Wai, which is the effect of defocusing. When you say defocus, you should mean that the whole photo is blurred and there is no clear place.

You need a camera with manual focus to focus the blurred picture manually, so that you can control the degree of blur, but why do you want this effect? . .