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  2. Aspect ratio (image) - Wikipedia

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

    The 6 × 6 cm image size was the classic 1:1 format in the recent past. 120 film can still be found and used today. Many Polaroid instant films were designed as square formats. Furthermore, up until August 2015, photo-sharing site Instagram only allowed users to upload images in 1:1 format.

  3. Four Thirds system - Wikipedia

    en.wikipedia.org/wiki/Four_Thirds_system

    Four Thirds logo. The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) design and development. [1] Four Thirds refers to both the size of the image sensor (4/3") as well as the aspect ratio (4:3).

  4. f-number - Wikipedia

    en.wikipedia.org/wiki/F-number

    The f-number N is given by: = where f is the focal length, and D is the diameter of the entrance pupil (effective aperture).It is customary to write f-numbers preceded by "f /", which forms a mathematical expression of the entrance pupil's diameter in terms of f and N. [1]

  5. List of common display resolutions - Wikipedia

    en.wikipedia.org/wiki/List_of_common_display...

    The resolution of 960H depends on whether the equipment is PAL or NTSC based: 960H represents 960 x 576 (PAL) or 960 x 480 (NTSC) pixels. [29] 960H represents an increase in pixels of some 30% over standard D1 resolution, which is 720 x 576 pixels (PAL), or 720 x 480 pixels (NTSC). The increased resolution over D1 comes as a result of a longer ...

  6. Rolleicord - Wikipedia

    en.wikipedia.org/wiki/Rolleicord

    Rolleicord Vb Type 3 "White Face," the last Rolleicord. The Rolleicord is a medium-format twin lens reflex camera made by Franke & Heidecke between 1933 and 1976.It was a simpler, less expensive version of the high-end Rolleiflex TLR, aimed at amateur photographers who wanted a high-quality camera but could not afford the expensive Rolleiflex.

  7. Digital photography - Wikipedia

    en.wikipedia.org/wiki/Digital_photography

    Several [quantify] digital cameras take photos in either ratio. Nearly all digital SLRs take pictures in a 3:2 ratio, as most can use lenses designed for 35 mm film. Some photo labs print photos on 4:3 ratio paper, as well as the existing 3:2. In 2005, Panasonic launched the first consumer camera with a native aspect ratio of 16:9, matching ...

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