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  2. List of largest optical refracting telescopes - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_optical...

    The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.

  3. South African units of measurement - Wikipedia

    en.wikipedia.org/wiki/South_African_units_of...

    The Rhynland rood (Rijnlandse roede) was a standard Dutch measurement.It was changed in 1859 to the "Cape Foot" due to a drift in standards. 1 Rhynland foot (Rijnlandse voet) = 12 Rhynland inches (Rijnlandse duim) = 1.030 English feet.

  4. Aspect ratio (image) - Wikipedia

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

    Cinerama at full height (three specially captured 35 mm images projected side by side into one composite widescreen image). 2. 6:1 = 8:3 = 24:9 Full-frame output from Super 16 mm negative when an anamorphic lens system has been used. Effectively, an image that is of the ratio 24:9 is squashed onto the native 15:9 aspect ratio of a Super 16 mm ...

  5. 100 metres hurdles - Wikipedia

    en.wikipedia.org/wiki/100_metres_hurdles

    During the 1960s, some experimental races were run over a distance of 100 metres using hurdles with a height of 30 inches (76.2 cm). During the 1968 Summer Olympics , a decision was made to introduce the 100 m hurdles from 1969, using hurdles with a height of 33 inches (83.8 cm).

  6. 8 mm caliber - Wikipedia

    en.wikipedia.org/wiki/8_mm_caliber

    This article is missing information about "7.92 mm" Mauser and members of the lineage (besides x33, which is already here). Please expand the article to include this information. Further details may exist on the talk page .

  7. Boeing 727 - Wikipedia

    en.wikipedia.org/wiki/Boeing_727

    The 727's fuselage has an outer diameter of 148 inches (3.8 m). This allows six-abreast seating (three per side) and a single aisle when 18-inch (46 cm) wide coach-class seats are installed. An unusual feature of the fuselage is the 10-inch (25 cm) difference between the lower lobe forward and aft of the wing as the higher fuselage height of ...

  8. 7 mm caliber - Wikipedia

    en.wikipedia.org/wiki/7_mm_caliber

    An overview of 7mm caliber cartridges, their history, and uses in firearms.

  9. German units of measurement - Wikipedia

    en.wikipedia.org/wiki/German_units_of_measurement

    The units of measurement of German-speaking countries consist of a variety of units, with varying local standard definitions. While many were made redundant with the introduction of the metric system, some of these units are still used in everyday speech and even in stores and on street markets as shorthand for similar amounts in the metric system.