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  2. Enlarger - Wikipedia

    en.wikipedia.org/wiki/Enlarger

    For example, an enlargement from a certain negative as a 12 x 18 cm (approx. 5 by 7 inch) print may be sufficient for a scrapbook viewed at 50 cm (20 inches), but insufficiently detailed for an A4 print hung on a hallway wall to be viewed at the same distance, though usable at a larger 120 x 180 cm (ten times larger) on a billboard to be viewed ...

  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. Solar camera - Wikipedia

    en.wikipedia.org/wiki/Solar_camera

    Often made life-size from a carte-de-visite negative 54.0 mm × 89 mm (2.13 in × 3.50 in) or, in an extreme case, enlarged 15x from 2.54 cm (1-inch) -square glass plates of the 'Pistolgraph' camera invented in 1859 by British photographer Thomas Skaife (1806–1876), the enlargement ratios were often considerable.

  5. Large format - Wikipedia

    en.wikipedia.org/wiki/Large_format

    The most common large format is 4×5 inches (10.2x12.7 cm), which was the size used by cameras like the Graflex Speed Graphic and Crown Graphic, among others. Less common formats include quarter-plate (3.25x4.25 inches (8.3x10.8 cm)), 5×7 inches (12.7x17.8 cm), and 8×10 inches (20×25 cm); the size of many old 1920s Kodak cameras (various versions of Kodak 1, 2, and 3 and Master View cameras ...

  6. ISO 216 - Wikipedia

    en.wikipedia.org/wiki/ISO_216

    A0 is defined so that it has an area of 1 m 2 (11 sq ft) before rounding to the nearest 1 millimetre (0.039 in). Successive paper sizes in the series (A1, A2, A3, etc.) are defined by halving the area of the preceding paper size and rounding down, so that the long side of A(n + 1) is the same length as the short side of An. Hence, each next ...

  7. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    3∶√2: A1 x 4 841 × 2378 33 + 1 ⁄ ... paper which are then cut or folded into the final size. A foot-long sheet with the ... × 6 + 1 ⁄ 4 inches. Royal sizes ...

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