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  1. The EF 70–200mm lenses are a group of telephoto zoom full-frame lenses made by Canon. The lenses have an EF mount to work with the EOS line of cameras. The lens comes in seven different versions, all of which have fixed maximum aperture at all focal lengths , and are L-series lenses.

  2. Canon FD 200 mm f / 2.8 S.S.C.: This lens, introduced in 1975, was identical to the first version of the New FD 200 mm f /2.8 except for the mounting hardware. 200 mm f / 4.0: Introduced in 1971, this early version did not have Super Spectra Coating. 200 mm f / 4.0 S.S.C.: introduced in 1973, this replaced the original, Spectra Coated version of this lens; as well as improved coating, the ...

  3. The Canon EF 50-200mm f / 3.5-4.5 is an EF mount normal-to-telephoto zoom lens. It is one of the first lenses in the Canon EF series. In June 1988, Canon announced the EF 50-200mm f / 3.5-4.5L lens. This lens has very similar physical qualities compared tof /

  4. Vernier scale. Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 ± 0.02 mm by adding 3.00 mm (left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the ...

  5. en.wikipedia.org › wiki › MitutoyoMitutoyo - Wikipedia

    Mitutoyo. Mitutoyo Corporation (株式会社ミツトヨ, Kabushiki Kaisha Mitsutoyo) is a Japanese multinational corporation specializing in measuring instruments and metrological technology, headquartered at Takatsu-ku, Kawasaki, Kanagawa. [3] It was founded in 1934 by Yehan Numata ( 沼田 恵範 Numata Ehan ).

  6. The EF55-200mm refers to two telephoto zoom lenses produced by Canon. They are of the EF lens mount that is compatible with the EOS line of cameras. The two versions are: f /4.5-5.6. f /4.5-5.6 II.

  7. The EF28-200mm f/3.5-5.6 USM lens was a superzoom lens made by Canon Inc. The lens has an EF-type mount, which fits the Canon EOS line of cameras. Due to its big focal range, it is useful for travel photography. One review rated the image quality of this