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In June 2017, the list is supposed to be complete including 201 past and present lenses, additionally 28 compatible teleconverters and three lens extension tubes with support for integrated autofocus-motors. Listed here are nearly all recent autofocus-lenses, because all manufacturers have included focus motors in their Nikon-compatible lenses ...
Kenko Co., Ltd. (株式会社ケンコー, Kabushiki-gaisha Kenkō) is a Japanese manufacturer and trading company of photographic accessories, especially known for its teleconverters and filters. [1] [2] Located in Tokyo, it has been producing conversion lenses since the 1960s. It produces camera lenses under the Kenko [3] and Tokina brand names
Extension tubes are sometimes confused with teleconverters, an optical component (i.e., containing lenses) designed to increase effective focal length. A close-up lens also enables focusing closer for macro photography but, unlike an extension tube, a close-up lens actually is an optical element.
A teleconverter works similarly to a telephoto group of a proper telephoto lens.It consists of a group of lenses which together act as a single diverging lens. The location of a teleconverter is such that the image produced by the lens is located behind the teleconverter in a distance smaller than its focal length.
A microwave cavity or radio frequency cavity (RF cavity) is a special type of resonator, consisting of a closed (or largely closed) metal structure that confines electromagnetic fields in the microwave or RF region of the spectrum. The structure is either hollow or filled with dielectric material. The microwaves bounce back and forth between ...
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Various popular RF connectors Electronic symbols for the plug and jack coaxial connectors Time-domain reflectometry shows reflections due to impedance variations in mated RF connectors. An RF connector (radio frequency connector) is an electrical connector designed to work at radio frequencies in the multi-megahertz range.
Family members of the Menendez brothers plan to meet with newly elected Los Angeles County District Attorney Nathan Hochman on Friday, Jan. 3, to push for a reduced sentence for the pair.
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