Film Collectors' Reference Center
Features motion picture film collecting for 35mm, 16mm, and 8mm. Also provides information on film formatting, projectors, film treatment, and a forum.
High Definition digital movie resources. Provides an examination of hi def movies, news, equipment, and an HDTV guide.
Historic sub-35 mm Film Formats
Examines the technical details and history of film that is smaller than 35mm. Includes a discussion of the strengths and weaknesses of each film type and pictures of the cameras and films.
One Hundred Years of Film Sizes
Gives a detailed examination of different film formats used over the last 100 years of film making.
Single-8 filmstock, supplies, film processing, and online reference materials.
Wikipedia: Film format
Examines different film formats from movies and still photography. Includes links to pages specific to each film format, as well as a timeframe of when each format was used.