film speed

200 is the natural number following 199 and preceding 201. << 0 100 200 300 400 500 600 700 800 900 >> The number appears in the Padovan sequence, preceded by 86, 114, 151 (it is the sum of the first two of these). 200 is the smallest base 10 unprimeable number - it can not be turned into a prime number by changing just one of its digi ...

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• 200 number - Other numbers in the 200s

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In optics, an aperture is something which restricts the diameter of the light path through one plane in an optical system. This may be the edge of a lens or mirror, or a ring or other fixture that holds an optical element in place, or it may be a special element placed in the optical path deliberately to limit the light admitted by the system. The aperture stop or simply the stop is the limiting aperture of the system—the aperture which restricts the diameter of the cone or cylinder of light that can enter and pass thr ...

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• Aperture - Application
• Aperture - In photography
• Aperture - Maximum and minimum apertures

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ASA may stand for: ASA is the ICAO code for Alaska Airlines Accessible Surface Area Acetylosalicylic acid, acetylsalicylic acid; see Salicylic acid and Aspirin Adaptive Simulated Annealing optimization algorithm. Advertising Standards Authority in the UK American Sailing Association American Society of Anesthesiologists and a I-V rating of anesthetic risk American Sociological Association American Speed Association, was a second-tier stock car ...

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The American National Standards Institute (ANSI) is a nonprofit organization that oversees the development of standards for products, services, processes and systems in the United States. The organization also coordinates U.S. standards with international standards so that American products can be used worldwide. For example, standards make sure that people who own cameras can find the film they need for them anywhere around the globe. The American National Standards Institute approves standards that are developed by representatives o ...

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Four hundred is the natural number following three hundred ninety-nine and preceding four hundred one. << 0 100 200 300 400 500 600 700 800 900 >> 400 number - Mathematical properties. 400 is the square of 20. A circle is divided into 400 grads, which is equal to 360 degrees and 2π radians. (Degrees and radians are the SI accepted units). 400 is a self number in base 10, since there is no integer that added to t ...

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• 400 number - Mathematical properties
• 400 number - Other fields
• 400 number - Integers from 401 to 499

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800 is the natural number following 799 and preceding 801. << 0 100 200 300 400 500 600 700 800 900 >> It is the sum of four consecutive primes (193 + 197 + 199 + 211). It is a Harshad number. Eight hundred is also: The original telephone area code for toll-free phone calls in the North American Numbering Plan and some other countries. The international direct dial code for toll-free international phone calls. In the ISO rating standard (aka ISO 5800), a common film speed for photographic films.< ...

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On 35mm film canisters there are two rows of six rectangular areas, the two left-most areas (with the spool post on the left) are both common-ground and are thus always bare metal. The remaining 5 bits in the top row represent 32 possible film speeds. But there are only 24 speeds representing the 1/3 "stops" from 25 ISO to 5000 ISO. In the second row, the first 3 bits represent 8 possible film lengths, although in practice only 12, 20, 24 and 36 exposures are encoded. The remaining 2 bits of the second row give 4 ranges of film tolerance, or latitude, in ±f-stops.See also:

DX encoding, DX encoding - Electrical contacts, DX encoding - Reading DX codes, DX encoding - External link

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To deal with the consequences of substantial overlap in areas of standardization and work related to information technology, ISO and IEC formed a Joint Technical Committee known as the ISO/IEC JTC1. It was the first such committee, and to date remains the only one. Its official mandate is: Develop, maintain, promote and facilitate IT standards required by global markets meeting business and user requirements concerning: design and development of IT systems and tools, performance and quality of IT products and sys ...

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International Organization for Standardization, International Organization for Standardization - ISO/IEC Joint Technical Committee 1

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There are several variables in classifying stocks; in practice, one orders raw stock by a code number, based on desired sensitivity to light. A piece of film consists of a light-sensitive emulsion applied to a tough, transparent base, attached to anti-halation backing. Originally the highly flammable cellulose nitrate, was used. In the 1930s, film manufacturers introduced "safety film" with a cellulose triacetate plastic base. All amateur film stocks were safety film, but the use of nitrate persisted for professional releases. Kodak d ...

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Film stock, Film stock - Classification and properties, Film stock - Reference, Film stock - Film Types

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In Windows XP, Exif information may be viewed by right clicking on an image file and clicking properties; from the properties dialog click the Summary tab. On Mac OS X 10.4 and above, this information may be viewed in the Finder by doing Get Info on a file and expanding the More Info section. ...

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Exchangeable image file format, Exchangeable image file format - Program support, Exchangeable image file format - Capitalization, Exchangeable image file format - Status, Exchangeable image file format - Viewing Exif, Exchangeable image file format - Example

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The aperture stop of a photographic lens can be adjusted to control the amount of light reaching the film or digital sensor (CCD or CMOS). In combination with variation of shutter speed and film speed, the aperture size will regulate the film's degree of exposure to light. Typically, a fast shutter speed will require a larger aperture to ensure sufficient light exposure, and a slow shutter speed will require a sm ...

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Aperture, Aperture - Application, Aperture - In photography, Aperture - Maximum and minimum apertures

Read more here: » Aperture: Encyclopedia II - Aperture - In photography

The aperture stop is an extremely important element in most optical designs. Its most obvious function is to reduce the amount of light that can reach the image plane, to prevent saturation of a detector or overexposure of film. The aperture stop has far more important functions, however: The size of the stop determines the depth of field of the system. Smaller stops produce a longer depth of field, allowing objects at a wide range of distances to all be in focus at the same time. The stop limits the effect of optical a ...

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Aperture, Aperture - Application, Aperture - In photography, Aperture - Maximum and minimum apertures

Read more here: » Aperture: Encyclopedia II - Aperture - Application

Four hundred is also a common ISO-standard film speed for photographic films. an HTTP status code for a bad request. a phrase meaning the wealthiest, most famous, or most powerful social group, leading to the generation of such lists as the Forbes 400 in the title of the film Les Quatre Cent Coups (The 400 Blows), a French film directed by François Truffaut. the designation for a class of Ontario highways called 400-Series Highways.< ...

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400 number, 400 number - Mathematical properties, 400 number - Other fields, 400 number - Integers from 401 to 499

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DX encoding, DX encoding - Electrical contacts, DX encoding - Reading DX codes, DX encoding - External link

Read more here: » DX encoding: Encyclopedia II - DX encoding - Reading DX codes