The following are useful resources with regard to Eastman Double-X (5222). Links will open in a new window.
| Kodak - B&W Motion Picture Film | Information and data on the available B&W motion picture film stock from Kodak. |
| Kodak - Technical Information Bulletins | Lots of useful info on short ends, recans, film speed ratings, ISO v EI speed ratings and luminance. |
| Kodak - FAQ | Answers a lot of questions. |
| Kodak - Film Packaging | All you need to know about the packaging and those numbers. |
| Chronology of Motion Picture Film | The history of Kodak motion picture film from 1889 to date. |
| Rangefinder Forum - Discussion on Double-X | The catalyst for this page. |
| Flickr - the Double-X group pool | Plenty of examples of Double-X in different developers and various ASA settings. |
| Cinematography.Com | Useful forum for technical discussions with regard to cinematography |
| Photographing The Films Of Ingmar Bergman | Published in American Cinematographer (October 1962). In striving for realism in his photographic lighting, Ingmar Bergman's cameraman, Sven Nykvist, finds new, fast black-and-white emulsions extremely helpful. |