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2. List of photographic film formats - Wikipedia

   en.wikipedia.org/wiki/List_of_photographic_film...

   A blank space means that manufacturer did not make film in that size. Two numbers in one box refers to films available with different numbers of exposures, usually 6 and either 10 or 12. Spool length is measured between inner faces of the flanges; several films of the same image size were available on different spools to fit different cameras.

3. Photo print sizes - Wikipedia

   en.wikipedia.org/wiki/Photo_print_sizes

   The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice the size of a 2R print, 6R twice the size of a 4R print and S8R twice the size of 6R. 4D/6D is a newer size for most consumer ...

4. Aspect ratio (image) - Wikipedia

   en.wikipedia.org/wiki/Aspect_ratio_(image)

   In motion picture formats, the physical size of the film area between the sprocket perforations determines the image's size. The universal standard (established by William Dickson and Thomas Edison in 1892) is a frame that is four perforations high. The film itself is 35 mm wide (1.38 in), but the area between the perforations is 24.89 mm × 18 ...

5. Paper size - Wikipedia

   en.wikipedia.org/wiki/Paper_size

   The international paper size standard is ISO 216. It is based on the German DIN 476 standard for paper sizes. Each ISO paper size is one half of the area of the next larger size in the same series. ISO paper sizes are all based on a single aspect ratio of the square root of 2, or approximately 1:1.41421. There are different series, as well as ...

6. ISO 216 - Wikipedia

   en.wikipedia.org/wiki/ISO_216

   The standard defines the "A", "B" and "C" series of paper sizes, which includes the A4, the most commonly available paper size worldwide. Two supplementary standards, ISO 217 and ISO 269 , define related paper sizes; the ISO 269 " C " series is commonly listed alongside the A and B sizes.

7. List of motion picture film formats - Wikipedia

   en.wikipedia.org/wiki/List_of_motion_picture...

   no standard no standard no standard 1 perf, center spherical 11 mm spherical Home Kinetoscope: Edison: 1912 unknown (amateur format) no standard no standard no standard no standard spherical 22 mm, 2 perf (on frameline between frame rows) 1.5 0.236" × 0.157" (three frames across width) spherical Pathe Kok: Pathé: 1912 unknown (amateur format ...