Why do street photography use wide-angle fixed-focus lenses?

Fixed-focus lenses usually have a large aperture, and Jiao Wai blur is very good.

Use a wide angle, because you want to bring scenery. If you use telephoto, if you want to shoot a composition with scenery, you have to go back a long way. There are many people in the street and the location is limited. You can't play telephoto, otherwise it will be all big photos.

In fact, there is nothing that must be used. . Choose the focal length according to the shooting situation and the effect to be achieved. Usually 24 wide angle, 35 humanities, 50 standards, 85 portraits.