F.A.Q. This section was created so you can find answers to a few common questions about microfilm. Each question opens up a pop-up page with the answer.   Why should I microfilm? Isn't it an outdated form of records retention? What is the difference between COM, Landscape, Source and Portrait images? Is my film negative or positive? Does it make any difference? What are some of the common types of microform media? What is the difference between cine and comic, simplex and duplex? What is background density? What is film resolution?