Thorsten Overgaards Leica Pages. See my more complete list of definitions at my article Leica Definitionsanastigmat an anastigmatic lens system Leitz Anastigmat Leitz I from 1. D3S_6972-top.jpg' alt='Leica Serial Numbers M7' title='Leica Serial Numbers M7' />Produced again as a retro camera in 2. Breaking Into Wall Street. ORIGIN late 1. 9th cent. DERIVATIVESastigmatic. ORIGIN mid 1. 9th cent. Greek stigma point ism. Aperture. The f stop on the camera that regulates how much light passes through the lens. On a f1. 4 lens the lens is fully open at f1. Recommendations top. Intro Specs Performance Usage Compared Recommendations. Get the LEICA M7 if you deserve the best. Get the LEICA if you do a lot of long. Leicas M4P is a critically acclaimed rangefinder camera built from 1980 to 1986, and carried serial numbers from 1543351 to 1692950. It was the successor to the M4. Leitz and Leica Lens Compendium and Leica Serial Numbers a work in progress. For each f step you halve the light. The aperture is basically the focal length divided with the f stop size of the hole 9. ORIGIN late Middle English from Latin apertura, from apert opened, from aperire to open. APOstands for apochromatically corrected lenses. In most lenses, optical design concentrates the focus of blue light and green light into a single plane, but red light falls slightly into another plane of focus. Red subjects, therefore, would be ever so slightly out of focus compared to blue and green subjects in the same frame. In APO lenses, the design and expense has been put in to making red light focus on the same plane as blue and green. Under a microscope you would see that all light subject is now in focus, creating a sharper image overall. Many manufacturers offer APO designs, but in most of these only the very center of the lens is APO corrected. Leica prides itself on making most of the frame APO corrected. ASPH stands for aspheric design. Most lenses have a spherical design that is, the radius. These are easy to manufacture by. This design. however restricts the number of optical corrections that can. ASPH lenses, however, involve usually 1 element that does. These elements. can be made by 1 expensive manual grinding, 2 molded plastic. Leicas patented press process, where the element. This design allows the manufacturer to introduce corrections. Practically. the lens performs better up to interpretation. There. is another Aspherical lens manufacture technique an uneven. The coating. is thicker on the edges or on the center, depending. Canon. Lens Work II calls these simulated. Simulated and Glass Molded GMo asphericals. Lidar Point Cloud Data Distribution and Processing OpenTopography harnesses cyberinfrastructure developed at the San Diego Supercomputer Center to allow users to. Hot spots Hot spots Hot spots Hot spots. Leica Serial Numbers M7' title='Leica Serial Numbers M7' />L Canon lenses, while the L lenses have actual. Beam Splitter Describes the way light travels when it enters the R series Leica SLR bodies when viewing and composing. The light beam is split into two one part goes through the semi silvered mirror to the light meter at the base of the mirror box, the rest is reflected upwards through the pentaprism to the viewfinder. Kilauea Mount Etna Mount Yasur Mount Nyiragongo and Nyamuragira Piton de la Fournaise Erta Ale. It is because of this beam splitting that you have to use Circular Polarizing filters on R cameras in order to obtain correct light meter readings. With regular linear pol. Bokehthe visual quality of the out of focus areas of a photographic image, especially as rendered by a particular lens Its a matter of taste and usually photographers discuss a nice or pleasant bokeh the out of focus area is always unsharp why the quality discussed is if one likes the way it renders or not by a particular lens. ORIGIN from Japanese bo ke which mean fuzziness or blur. Here is an example of bokeh Bokeh with 5. Summicron M II f2. Leica M9. Compur. Curently no origin known. Leica I Compur camera 1. Leica Summicron II Compur 5. CSCentral Shutter, as in the Leica S lenses for the Leica S2 where a shutter is located in the lens itself. DOF Depth of Field How big a distance in an image that is acceptable sharp. The DOF is determined by the subject distance the farther away, the larger area is sharp the closer the focus is, the less of the lage is sharp, the lens aperture the depth of field is narrow at f1. The DOF is usually indicated on the lens by the focus barrel where one can see how large the DOF will be at different f stops for that lens. As an example, a Leica 2. Super Angulon M f3. Here is an example of narrow DOF where only a few milliemeters are sharp Leica 5. Nictilux M f1. 0 f1. Leica M9. Elcan. Ernst Leitz Canada, established 1. Ernst Leitz Canada. In 1. 99. 8, the ELCAN plant was sold to Raytheon USA, who bought it from its previous owner, Hughes Aircraft Co. Elcan R is also the name of s series of lenses made in the 1. U. S. Navy High Resolution Small Format Camera System during the Viet Nam war. Elmar Refers to the maximum lens aperture here f. Historically derived from the original 1. Elmax lens, which was an acronym of Ernst Leica and Professor Max Berak, designer of the original lenses. Later that year the 5. Elmar superceded the Elmax, which was discontinued due to its complexity and high cost of manufacture. Elmarit Refers to the maximum lens aperture here f. The name is obviously derived from the earlier and slower Elmar designation. Not every f. 2. 8 lens is called an Elmarit though, the most obvious current exception being the 5. Elmar M collapsible lens which for nostalgia and marketing reasons has kept the original 1. Elmar name the 5. Elmar, manufactured 1. Leicas most famous and popular lenses. Elmax. Elmax E. Leitz Max Berak. Ernst Leitz was the founder of Ernst Leitz Optical Industry which later became Leica. Professor Dr. Max Berak was employed at Leica in 1. Leica lens which Ernst Leitz asked him to design for the Barnacks camera the 1. Oscar Barnack who invented it. The lens was a f3. Leitz Anstigmat and later the Elmax. ORIGIN early 2. 0th cent. One f stop is a doubling or halving of the light going through the lens to the film, by adjusting the aperture ring. Adjusting the f setting from f 1. Most Leica lenses has half f stops to enable the photographer to adjust the light more precisely. Focal length. The distance. That is the construction definition based on simple lens systems where a 4. Today one call it effective focal length EFL as a 4. The 3. 5 4. 20mm zoom on the Leica V Lux 1 is for example only ca. For photographers its more interesting that focal length indicates if it is a wideangle lens ex. A 3. 5mm lens is a ca. This is the practical, usable information about focal lengths a photographer can use. Four Thirds. The Four Thirds System is a standard created by Olympus and Kodak for digital SLR camera design and development. The system provides a standard which, with digital cameras and lenses available from multiple manufacturers, allows for the interchange of lenses and bodies from different manufacturers. Companies developing 4 3 cameras andor lenses are Fuji, Kodak, Leica Leica Digilux 3, Olympus, Panasonic, Sanyo, Sigma. See www. 4 3system. A further development in this was Micro Four Thirds Systems. FF Full FrameIn sensors full frame usually refers to sensors the size of a full 2. The full frame technically deifinition thouhg is a sensor that camtures the full frame in one go as the early sensors as in Leica S1 scanned the imagesenor over a period of time. Hektor Refers to the maximum lens aperture usually f. The name was apparently taken from the name of lens designer Professor Max Bereks dog. See Leica History article. Kyocera. Sub manufacturer of lenses. Has made certain lenses for Leitz, Carl Zeiss, etc. Leica. LEItz CAmera. Founded 1. 84. 9 in Wetzlar, Germany.