If shooting the whole process, it is best to use a fixed focus of 24 or 35mm, because it is convenient for narrow space, and sometimes it can be handled in stairs, elevators, rooms, etc. And you can easily shoot the whole table and stage in the restaurant. 50mm is ok, but the visual sense is flat, and it is not recommended to be above 85, because the wedding lacks a wide-angle end, which will be difficult to shoot.