What types of shots extensively used soft focus?

Close-ups of lead actresses

Explanation:

In photography, it is a style in which the lens forms images that are blurred due to spherical aberration while retaining sharp edges.  It was used in classical Hollywood cinema during 1950's Hollywood productions to create a "romantic" effect. Some of its characteristics are that it creates a "star glow", it was often used in close ups and in love scenes, and often used when filming female actresses, as the softer focus is flattering for their complexion.