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  2. List of pitch intervals - Wikipedia

    en.wikipedia.org/wiki/List_of_pitch_intervals

    For instance, the limit of the just perfect fourth (4:3) is 3, but the just minor tone (10:9) has a limit of 5, because 10 can be factored into 2 × 5 (and 9 into 3 × 3 ).

  3. Time signature - Wikipedia

    en.wikipedia.org/wiki/Time_signature

    A time signature (also known as meter signature, [1] metre signature, [2] and measure signature) [3] is a convention in Western music notation that specifies how many note values of a particular type are contained in each measure ( bar ). The time signature indicates the meter of a musical movement at the bar level.

  4. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    Other uses for fractions are to represent ratios and division. [1] Thus the fraction 3 4 can also be used to represent the ratio 3:4 (the ratio of the part to the whole), and the division 3 ÷ 4 (three divided by four).

  5. 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). The Olympus E-1 was the first Four Thirds DSLR, announced and released in 2003.

  6. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    For a quick understanding of numbers like 1/2.3", see § Table of sensor formats and sizes. For broader coverage of this topic, see Image sensor. 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 ...

  7. Micro Four Thirds system - Wikipedia

    en.wikipedia.org/wiki/Micro_Four_Thirds_system

    The Micro Four Thirds system ( MFT or M4/3 or M43) (マイクロフォーサーズシステム, Maikuro Fō Sāzu Shisutemu) is a standard released by Olympus Imaging Corporation and Panasonic in 2008, [1] for the design and development of mirrorless interchangeable lens digital cameras, camcorders and lenses. [2] Camera bodies are available ...

  8. Three-fifths Compromise - Wikipedia

    en.wikipedia.org/wiki/Three-Fifths_Compromise

    In the United States Constitution, the Three-fifths Compromise is part of Article 1, Section 2, Clause 3 . Section 2 of the Fourteenth Amendment (1868) later superseded this clause and explicitly repealed the compromise.

  9. Aspect ratio (image) - Wikipedia

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

    The aspect ratio of an image is the ratio of its width to its height. It is expressed as two numbers separated by a colon, width:height. Common aspect ratios are 1.85:1 and 2.40:1 in cinematography, 4:3 and 16:9 in television, and 3:2 in still photography .