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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.
Many macro lenses are characterised by a high amount of chromatic aberration, especially when using reversed-lens, extension tube or close-up lens. Some macro lenses, called apochromatic lenses , are designed to better control this, such as the Laowa 100mm f/2.8 2x Ultra Macro APO and the Sigma APO MACRO 150mm F2.8.
Canon New FD lens mounting surface.. The FD lens mount is a breech-lock mount, which is a variation of the common triple-flanged bayonet attachment. The advantage of the breech-lock over the bayonet is that neither the contact surfaces between the body and lens, nor the signalling mechanisms, rotate against each other when the lens is mounted.
A macrophotography bellows mounted on a Canon FT QL (1966) A folding Kodak camera with bellows In photography, a bellows is the accordion-like, pleated expandable part of a camera, usually a large or medium format camera, to allow the lens to be moved with respect to the focal plane for focusing. [1]
Anorectal manometry (ARM) is a medical test used to measure pressures in the anus and rectum and to assess their function. [1] [2] The test is performed by inserting a catheter, that contains a probe embedded with pressure sensors, through the anus and into the rectum. [3]
It is provided as a standalone application and extension for Mozilla Firefox, Google Chrome, and Internet Explorer web browsers. Developed by iOpus/Ipswitch, It adds record and replay functionality similar to that found in web testing and form filler software. [6] The macros can be combined and controlled via JavaScript.
A teltron tube (named for Teltron Inc., which is now owned by 3B Scientific Ltd.) is a type of cathode-ray tube used to demonstrate the properties of electrons. There were several different types made by Teltron including a diode, a triode, a Maltese Cross tube, a simple deflection tube with a fluorescent screen, and one which could be used to ...
V-Set: Multiple line IV injection site whereby several lines can be used at the same time for administering drugs to the patient. In intravenous therapy a Y-Set , T-Set and V-Sets are Y-, T- and V-shaped three-way connector sets made of connecting plastic tubes used for delivering intravenous drugs into the body from multiple fluid sources.