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I want to introduct something about . 35mm film print frames. At far left and far right, outside the perforations, is the SDDS soundtrack as an image of a digital signal. Between the perforations is the Dolby Digital soundtrack (note the tiny Dolby "Double D" logo in the center of each area between the perforations). Just inside the perforations, on the left side of the image, is the analog optical soundtrack, with two channels encoded using Dolby SR noise reduction that can be dematrixed into four channels using Dolby Pro Logic. The optical timecode used to synchronize a DTS soundtrack, which sits between the optical soundtrack and the image, is not pictured. Finally, the image here is an anamorphic image used to create a 2.39:1 aspect ratio when projected through an anamorphic lens. Note the thin frame lines of anamorphic prints. 35 mm film is the basic film gauge most commonly used for both still photography and motion pictures, and remains relatively unchanged since its introduction in 1892 by William Dickson and Thomas Edison, using film stock supplied by George Eastman. The photographic film is cut into strips 35millimeters (about 1 3/8 inches) wide hence the name. The standard negative pulldown for movies ("single-frame" format) is four perforations per frame along both edges, which makes for exactly 16 frames per foot (for stills, the standard frame is eight perforations). A wide variety of largely proprietary gauges were used by the numerous camera and projection systems invented independently in the late 19th century and early 20th century, ranging from 13mm to 75mm (0.512.95in). 35mm was eventually recognized as the international standard gauge in 1909, and has remained by far the dominant film gauge for image origination and projection despite threats from smaller and larger gauges, and from novel formats, because its size allows for a relatively good tradeoff between the cost of the film stock and the quality of the images captured. The ubiquity of 35mm movie projectors in commercial movie theaters makes it the only motion picture format, film or video, that can be played in almost any cinema in the world. The gauge is remarkably versatile in application. In the past one hundred years, it has been modified to include sound, redesigned to create a safer film base, formulated to capture color, has accommodated a bevy of widescreen formats, and has incorporated digital sound data into nearly all of its non-frame areas. Since the beginning of the 21st century, Eastman Kodak and Fujifilm have held a duopoly in the manufacture of 35mm motion picture film. Contents 1 Early history 1.1 Amateur interest 2 How film works 2.1 Other common types of photographic films 3 Attributes 3.1 Color 3.2 Safety film 4 Common formats 4.1 Academy format 4.2 Widescreen 4.3 Super 35 4.4 3-Perf 4.5 VistaVision 4.6 Perforations 4.7 Recent innovations in sound 5 Technical specifications 6 See also 6.1 Lists 7 References 8 External links // Early history Main article: Kinetoscope In 1880, George Eastman began to manufacture gelatin dry photographic plates in Rochester, New York. Along with W. H. Walker, Eastman invented a holder for a roll of picture-carrying gelatin layer coated paper. Hannibal Goodwin's invention of nitrocellulose film base in 1887 was the first transparent, flexible film; the following year, Emile Reynaud developed the first perforated film stock. Eastman was the first major company, however, to mass-produce these components, when in 1889 Eastman realized that the dry-gelatino-bromide emulsion could be coated onto this clear base, eliminating the paper. With the advent of flexible film, Thomas Alva Edison quickly set out on his invention, the Kinetoscope, which was first shown at the Brooklyn Institute of Arts and Sciences on May 9, 1893. The Kinetoscope was a film loop system intended for one-person viewing. Edison, along with assistant W. K. L. Dickson, followed that up with the Kinetophone, which combined the Kinetoscope with Edison's cylinder phonograph. Beginning in March 1892, Eastman and then, from April 1893 into 1896, New York's Blair Camera Co. supplied Edison with 1 9/16nch filmstock that would be trimmed and perforated at the Edison lab to create 35mm gauge filmstrips (at some point in 1894 or 1895, Blair began sending stock to Edison that was cut exactly to specification). Edison's aperture defined a single frame of film at 4 perforations high. Edison claimed exclusive patent rights to his design of 35mm motion picture film, with four sprocket holes per frame, forcing his only major filmmaking competitor, Americ an Mutoscope & Biograph, to use a 68mm film that used friction feed, not sprocket holes, to move the film through the camera. A court judgment in March 1902 invalidated Edison's claim, allowing any producer...(and so on) To get More information , you can visit some products about leather card holder, electric plug adapters, cheap dvr, warm bag, pvc strip curtains, electronic bathroom scales, wooden outdoor chair, yellow corn meal, drinking plastic cup, cable ethernet splitter, . The products should be show more here!