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Encyclopedia > Full frame digital SLR
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A full frame digital SLR is a digital SLR camera built for a pre-existing range of photographic lenses that takes full advantage of the image circle of those lenses by having an imager that is the full size of the film frame the lenses were designed to cover. A SiPix digital camera next to a matchbox to show scale. ... Photographic lens A photographic lens (or more correctly, objective) is an integrated system comprising one or more simple optical lens elements, used for an optical telescope, camera or microscope. ... A strip of 16 mm film consisting of many frames A film frame, or just frame, is one of the many single photographic images in a movie. ...


The term, obviously, only applies to cameras built to be compatible with the lenses of a system built for film. It is meaningless for such systems as Olympus's Four Thirds System, which were built around a image size already covered by affordable image sensors. Undeveloped Arista black and white film, ISO 125. ... This article refers to a Japanese camera maker. ... The Four Thirds System is a standard for digital SLR camera design and development. ...


The chief reason that digital SLRs have not been full frame is to do with the cost of producing such large sensors. As chip sizes get larger, the yield gets drastically lower and thus the prices higher. Moore's law does not apply here; most of the semiconductor industry's advances in affordability have been driven by the ability to make circuits smaller and smaller, but an imaging chip must remain large, and such large chips get cheaper only slowly. Jump to: navigation, search Growth of transistor counts for Intel processors (dots) and Moores Law (upper line=18 months; lower line=24 months) Moores law is the empirical observation that at our rate of technological development, the complexity of an integrated circuit, with respect to minimum component cost... Jump to: navigation, search A semiconductor is a material with an electrical conductivity that is intermediate between that of an insulator and a conductor. ...


The secondary reason is that digital imaging chips tend to have a much narrower range of acceptance angles than film. Thus, the sensor will be less sensitive to light towards the edges of the image circle, where the light rays are likely to be further from perpendicular. Adding to this, lenses tend to produce poorer results towards the edge of the circle in any case. A smaller image sensor stays within the "sweet spot" of the lens and sensor combination with less difficulty. In optical fibers the acceptance angle θ is the half-angle of the cone within which incident light is totally internally reflected by the fiber core. ...


While a digital camera for any format could be full frame, in practice all the examples produced have been for 35mm format. The first, fairly unsuccessful attempt was by Contax with a Philips sensor; Pentax worked with this sensor as well but abandoned it before production. Eastman Kodak produced three models of full-frame camera, but all are now discontinued. The company that has had the most success with full-frame sensors is Canon Inc., whose full-frame sensor cameras have been very successful in the high-end professional photography field. Their newly released model, the Canon EOS 5D, seeks to emulate that success at a much lower price point. 135 is a film format for still photography. ... Contax is a camera brand noted for its unique, and sometimes odd, technical innovation and a wide range of Carl Zeiss lenses. ... Jump to: navigation, search Koninklijke Philips Electronics N.V. (Royal Philips Electronics N.V.), usually known as Philips, (Euronext: PHIA, NYSE: PHG) is one of the largest electronics companies in the world. ... Jump to: navigation, search PENTAX Corp. ... Jump to: navigation, search Eastman Kodak Company NYSE: EK is a large multinational public company producing photographic materials and equipment. ... Jump to: navigation, search Canon logo Canon Inc. ... Jump to: navigation, search The EOS 5D is a professional, 12. ...


Available full frame digital SLRs


  Results from FactBites:
 
Complete Digital Photography » Do you need a full-frame digital SLR? (3324 words)
Really DX sensors born out of cost nessecity and canon switched as soon as it was cost effective to produce full frame where as Nikon is very stupid not to have came out with a Full Frame (and I am a Nikon user).
Full frame sensors may indeed replace *medium format* and that’s way beyond what 35mm film was used for.
But how about some smaller format digital sensors for that are designed to be closer to the back of the lens - sensors that are concave to avoid some of the optical problems of trying to spread a wide angle image onto a digital sensor.
  More results at FactBites »


 

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