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  2. Zeiss Sonnar - Wikipedia

    en.wikipedia.org/wiki/Zeiss_Sonnar

    A zoom lens derivative of the Sonnar, the Vario-Sonnar also exists, in which a number of lens groups are replaced with floating pairs of lens groups. The Vario-Sonnar is a Carl Zeiss photographic lens design named in relation to the Zeiss Sonnar. This lens type has a variable focal length which can replace a series of lenses for a certain ...

  3. Line-replaceable unit - Wikipedia

    en.wikipedia.org/wiki/Line-replaceable_unit

    A line-replaceable unit (LRU [1]), lower line-replaceable unit (LLRU), [citation needed] line-replaceable component (LRC), or line-replaceable item (LRI) [2] is a modular component of an airplane, [3] ship or spacecraft [4] (or any other manufactured device) that is designed to be replaced quickly at an operating location (1st line).

  4. Stowage plan for container ships - Wikipedia

    en.wikipedia.org/wiki/Stowage_plan_for_container...

    Hatch cover clearance – Hatch cover clearance refers to how many "High Cube" (height over 8.6 ft (2.6 m)) containers allowed to load in the hold without preventing the hatch cover from closing correctly. [3] Visibility – The number of High cube containers shouldn't exceed a set number of High cube containers in each row/bay on-deck.

  5. Lens (hydrology) - Wikipedia

    en.wikipedia.org/wiki/Lens_(hydrology)

    A freshwater lens on an island. In hydrology, a lens, also called freshwater lens or Ghyben-Herzberg lens, is a convex layer of fresh groundwater that floats above the denser saltwater and is usually found on small coral or limestone islands and atolls.

  6. DSV Alvin - Wikipedia

    en.wikipedia.org/wiki/DSV_Alvin

    The sunken Alvin on the ocean bottom in June 1969, photographed by USNS Mizar (T-AGOR-11). Alvin , aboard the Navy tender ship Lulu , was lost as it was being transported on October 26, 1968. Lulu , a vessel created from a pair of decommissioned U.S. Navy pontoon boats with a support structure added on, was lowering Alvin over the side when two ...

  7. Lake freighter - Wikipedia

    en.wikipedia.org/wiki/Lake_freighter

    Modern lakers are usually designed and constructed for a 45-50 year old service life, outlasting ocean-going bulk carriers. [43] As of 2023, ocean-going bulk freighters average an 11-year lifespan, due in part to the corrosive effects of saltwater. [44] [45] Some of the lakers have been known to have long careers.

  8. List of telescope parts and construction - Wikipedia

    en.wikipedia.org/wiki/List_of_telescope_parts...

    Objective: The first lens or curved mirror that collects and focuses the incoming light. Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror.

  9. Tessar - Wikipedia

    en.wikipedia.org/wiki/Tessar

    The Vario-Tessar name has been used by Zeiss for various zoom lenses fitted to Sony cameras, including that of the digital still cameras Sony Cyber-shot DSC-P100, [18] DSC-P200, and DSC-W330 as well as the E-mount lenses such as Sony Alpha Carl Zeiss Vario-Tessar T* E 4/16-70mm ZA OSS (Sony SEL-1670Z) and Sony Alpha Carl Zeiss Vario-Tessar T ...