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  2. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    In digital photography, the image sensor format is the shape and size of the image sensor. The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular sensor. Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras ...

  3. Ring size - Wikipedia

    en.wikipedia.org/wiki/Ring_size

    In the United States, Canada, and Mexico, ring sizes are specified using a numerical scale with 1⁄4 steps, where whole sizes differ by 0.032 inches (0.81 mm) of internal diameter, equivalent to 0.1005 inches (2.55 mm) of internal circumference. The relationship of this size ( ) to ISO 8653:2016 circumference ( ) is , while the relationship to ...

  4. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    medium-bore refers to calibers with a diameter of 0.33 inches (8.4 mm) to 0.39 inches (9.9 mm) large-bore refers to calibers with a diameter of 0.40 inches (10 mm) or larger There is much variance in the use of the term "small-bore", which over the years has changed considerably, with anything under 0.577 inches (14.7 mm) considered "small-bore ...

  5. 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 ...

  6. Aspect ratio (image) - Wikipedia

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

    The film itself is 35 mm wide (1.38 in), but the area between the perforations is 24.89 mm × 18.67 mm (0.980 in × 0.735 in), leaving the de facto ratio of 1.33:1. [ 3 ] With a space designated for the standard optical soundtrack , and the frame size reduced to maintain an image that is wider than tall; this resulted in the Academy aperture of ...

  7. 120 film - Wikipedia

    en.wikipedia.org/wiki/120_film

    The 120 film format is a roll film which is nominally between 60.7 mm and 61.7 mm wide. Most modern films made today are roughly 61 mm (2.4 inches) wide. The film is held in an open spool originally made of wood with metal flanges, later with all-metal, and finally with all-plastic. The length of the film is nominally between 820 millimetres ...

  8. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10−2 metres (⁠ 1 100 ⁠ m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimetres. 1 cm – 0.39 inches. 1 cm – edge of a square of area 1 cm 2.

  9. Display size - Wikipedia

    en.wikipedia.org/wiki/Display_size

    Display size. On 2D displays, such as computer monitors and TVs, display size or viewable image size (VIS) refers to the physical size of the area where pictures and videos are displayed. The size of a screen is usually described by the length of its diagonal, which is the distance between opposite corners, typically measured in inches.

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