bmattock
Veteran
http://www.adorama.com/alc/news/Fujifilm-brings-4x5-instant-black-and-white-film-to-US
FB-100B is a peel-apart panchromatic film designed for large format cameras that accept instant film backs. The film is primarily designed for proofing for professional and commercial photographers. Image area is 3.5x4.5, and images are fully developed in 30 seconds. The film is available in 10-sheet packs which are currently available for under $29. While Fujifilm offers a 4x5 PA-45 Pack Holder ($205), the film is also compatible with Polaroid's 550 back—which, used, costs about the same as a new Fujifilm Pack holder.