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  2. Polaroid 20×24 camera - Wikipedia

    en.wikipedia.org/wiki/Polaroid_20×24_camera

    According to John Reuter, a former Polaroid employee, only six cameras were built between 1976–78; five remain in use. [4] Tracy Storer clarified that two prototypes were built first, then using the lessons learned, five finished cameras were completed; famous artists and photographers were invited to use the cameras at the Polaroid studios on the condition that Polaroid was allowed to keep ...

  3. Picture framing glass - Wikipedia

    en.wikipedia.org/wiki/Picture_framing_glass

    Glass thicknesses typically range from 1.8 to 2.5 millimetres (0.071 to 0.098 in). Clear glass has light transmission of approximately 90%, absorption of approximately 2%, and reflection of approximately 8%. Whereas absorption can be reduced by using low-iron glass, reflection can only be reduced by an anti-reflective surface treatment.

  4. 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 ...

  5. 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 ...

  6. Picture frame - Wikipedia

    en.wikipedia.org/wiki/Picture_frame

    View of a frame-maker's workshop, oil on canvas, circa 1900 The elaborate decoration on this frame may be made by adhering molded plaster pieces to the wood base.. A picture frame is a container that borders the perimeter of a picture, and is used for the protection, display, and visual appreciation of objects and imagery such as photographs, canvas paintings, drawings and prints, posters ...

  7. Half-frame camera - Wikipedia

    en.wikipedia.org/wiki/Half-frame_camera

    It is closer to the normal frame size of a 35 mm motion film. This leaves half frame cameras to derive their film plate size from the aspect ratio, and frame size that was first designated by Thomas Edison (24.89 by 18.67 millimetres or 0.980 by 0.735 inches) at the dawn of the motion picture industry. [ 1 ]

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