These two pitches are only slightly different. The short pitch is used in film stocks intended for shooting (making negatives) and many intermediate applications, and the long pitch is used in film stocks intended for projections (making positives) and intermediate applications. For motion picture 16 mm and 35 mm film, there are two different perforation pitches - the short pitch and the long pitch. The spacing between the tops of two sequential perforations is called perforation pitch or simply pitch and the distance between the tops of two successive frames is called frame pitch or pull-down distance. The most common film gauges are listed in the picture below.Ī piece of 35-mm film showing perforation and the two pitches: 1 - frame pitch, 2 - perforations, 3 - perforation pitch Film formats usually have distinctive names, for example, VistaVision or IMAX, which are actually names of technologies. 35 mm is the most popular format for feature films and television. There is also an 8 mm gauge that was used by amateurs before the digital era. Three primary film gauges used for film production are 16 mm, 35 mm, and 65/70 mm. It may also indicate the size of the image sensor in a digital camera. It may also indicate the full set of characteristics, the standard for image capture and projection. The term “film format” may indicate the size of the film stock being used for shooting, which is called film gauge. An Example of Calculations Definitions and Formulasīelow, you will find the description of film formats, various terms used in cinematography, and formulas that you may need and that are used in this calculator to calculate the film footage.
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