Response to A Super film from Germany Gibabit film

There are people here confused the resolution of film WITH resolution of lens. These are two entirely different things. There are a number of Kodak and Agfa microfilm out there which are capapble of several thousand lpmm resolution. Some people then argue it is not possibel to focus 1/7000 mm on film. When one talk about 7000 lpmm resolution film You don't understand what resolution of film really means. Resolution of "Lens on film" is the convolution of resolution of film with the resolution of lens. Since the convulved resolution of Film+ lens is can be measured, and the intrinsic resolution of lens (ie aerial resolution) can also be measured by observing with microscope on aerial image, the resolution of film can be calculated. For example of a lens of intrinsic 400lpmm forms image on a film X with resulting resolution of 250 lpmm, the resolution of film X is 700 lpmm, if the on film resolution is 350 lpmm, the resolution of film is 3000 lpmm; if the combo res is 370 lpmm, the res of film is 5000 lpmm. In other word, the higher the resolution of film the closer the combo lpmm approaches that of the lens's intrinsic resolution. The rule is 1/combo-resolution = 1/resolution-of-film +1/resolution-lens

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