Interfit INT391 7 mm Umbrella Black White 33 85cm Description. This is an Interfit 33 85 cm White Black Backing Umbrella. White umbrellas are used to bounce light onto a subject. They provide softening with soft shadows. Light loss is usually 2 fstops compared to the same light used direct bare light. The black backing cuts down on stray light. Use this size umbrella for a 1
- 2 person head-&-shoulders portrait.