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2. 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 ...

3. 35 mm equivalent focal length - Wikipedia

   en.wikipedia.org/wiki/35_mm_equivalent_focal_length

   35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...

4. List of image resolutions used in digital cameras - Wikipedia

   en.wikipedia.org/wiki/List_of_image_resolutions...

   Actual pixel count Megapixels Camera examples 32 32 1:1. ... but no information about the exact image size available.) ... 80.1 Phase One IQ180: 9,372 9,372 1:1 ...

5. File:SensorSizes.svg - Wikipedia

   en.wikipedia.org/wiki/File:SensorSizes.svg

   10:20, 1 August 2014: 484 × 610 (117 KB) MarcusGR: Added 2/3'' format and removed Medium Format. Updated info about brands adopting sensors. 17:48, 4 October 2011: 500 × 700 (30 KB) Jesh: Added Nikon CX size (Nikon 1 system). Removed redundant 35mm grey frame to make space. 12:57, 4 December 2010: 500 × 700 (23 KB) Jason Quinn: Changed KAF ...

6. Advanced Photo System - Wikipedia

   en.wikipedia.org/wiki/Advanced_Photo_System

   Initial testing of APS film cartridges with 40-exposure rolls started in 1994; details about the magnetic-stripe information encoding [4] and formats were provided later that year, although the prototype "Standard" frame size, at that time, was narrower than the final APS-C frame, with a 7:5 aspect ratio, 23.4×16.7 mm (0.92×0.66 in). [5]

7. Medium format - Wikipedia

   en.wikipedia.org/wiki/Medium_format

   The Leaf Aptus-II 12's sensor size of 53.7 mm × 40.3 mm is 92% of the area of a 56 mm × 41.5 mm standard-sized 6 × 4.5 frame, 69% of a 56 mm × 56 mm square-sized 6 × 6 frame, and 45% of the area of a 56 mm × 84 mm 6 × 9 frame. Introduced in December 2010, the Pentax 645D is a 40 megapixel medium-format DSLR. The camera has a 44×33 mm ...