How can I take a clear picture of an object and blur the surrounding objects?

Well, this effect is called background blurring, which means that the subject is clear and prominent but the unnecessary background will be blurred, thus highlighting the theme to be expressed.

Background blur is simple. Lower the aperture f value, that is, adjust the aperture to the maximum (the aperture f value is inversely proportional to the aperture size). Then use the long focal length, that is, the lens is stretched to the longest. The photos taken in this way will have a blurred effect. Ordinary machines can shoot very well, and the blur effect is good. The obvious degree of blur depends on how wide your aperture can be and how long your focal length can be ~