As of 2010, the EF and EF-S lens families vary in cost from around 500 USD to over 10,000 USD new, and signify a corresponding variety of high quality from entry-Ievel to the absolute top-of-the-line professional level.Its a typical misunderstanding that these two acronyms send to various things, as youll usually find them both available in the exact same lens.EF stands for Electro-Focus and is definitely a proprietary lens-mounting technology, whereas AF basically stands for Auto-Focus.History Fotolia.com dsIr camera lens business isolated image by dinostock fróm Fotolia.com Sincé 1987, surveillance cameras manufactured by the international imaging and optical gadgets company Canon Inc.
This proprietary system has been a step forwards in cameras technologies from the FD position, its predecessor, which utilized mechanical connections between the camcorder entire body and zoom lens for managing the optics (focus, aperture). The EF mount provides no like mechanical contacts and instead depends on electric impulses transferred from the video camera entire body to strength motors constructed straight into the lens themselves. This fresh mounting system ushered in Canóns EOS (Electro-0ptical Program) household of surveillance cameras and permitted the business to more develop their AF, ór auto-focus, techniques. With zoom lens mechanisms simply no longer dependent upon the cameras entire body they had been connected to, auto-focus advancements came rapidly. Since the centering motors shifted inside the lens, they could end up being processed to work more efficiently and preciselycustom tailored to each specific modeland were not subject matter to the mechanical deterioration of their fittings over time. Features Fotolia.com zoom lens picture by leafy fróm Fotolia.com Almost all EF lens feature individual zoom lens and focus rings, as properly as a distancescale home window for exhibiting the focus distance. They furthermore feature quick and precise auto-focus features, with higher-end video camera bodies permitting for up to 41 distinct locations of multi-point focus. Image Stabilization is usually a associated technology accessible in many of the EF lens, which can make subtle optical modifications on the fly to make up for the minimal jitters and shakés from hand-heId filming. EF lenses can also be outfitted with front-threaded filters, and several models also offer assistance for internal drop-in filter systems and rear-mounted gelatin slots. The bigger EF lenses also feature a tripod mount and zoom lens hood position for safer filming. To support in rapidly affixing EF lenses to your cameras, each zoom lens is noted with a distinctive connection marking near the back end that assists you position the zoom lens correctly for link with the camcorder body. Varieties and Identification Fotolia.com camera lens picture by dinostock fróm Fotolia.com Thé EF zoom lens family provides expanded to consist of two varieties, and many individual versions, including prime (a individual focal length) and standard zoom lenses (multiple focal measures). The second type is a alternative known as the EF-S (for Short back focus) that had been released in 2003. EF-S lenses feature a shorter length between the end of the zoom lens and the picture sensor, which allows for smaller sized lens enclosures and lighter lenses. The technologies is especially well appropriate for wide-angle taking and is just mountable on surveillance cameras that support the system; older video cameras that assistance only the standard EF zoom lens support will not be able to make use of EF-S lenses because of mechanised incompatibilities. The best way to determine an EF-S lens is as soon as once again by its attachment marking, which is shaped like a whitened block on these versions. Difference In Camera Lenses Series Is CertainlyBenefits Fotolia.com photographe image by bacalao fróm Fotolia.com Thé EF ánd EF-S zoom lens series is certainly among thé industrys finest, ánd the superior L (for Luxury) series of EF lens represents the pinnacle of Canons optics technology. These lenses are immediately identifiable by their whitened and red colors. In practical conditions, all EF lenses are long lasting and versatile, permitting for great quality shooting in nearly any problems. Additionally, the Image Stabilization system available on most EF lenses is perfect for hand-held pictures since it adjusts very much of the blurriness and some other optical degeneration that can occur because of volatile shooting situations. Considerations Therefore while AF (auto-focus) technologies is obtainable on nearly every surveillance camera and zoom lens system on the marketplace, the EF acronym relates particularly to a proprietary installation system produced by Cannon, and therefore the lens and their benefits are just developed for Cannon cams, although adapters perform exist to permit certain lens to become utilized on additional cameras.
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