DSLR: Difference between revisions
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#REDIRECT [[Digital single-lens reflex camera]] |
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A '''digital single lens reflex''' or DSLR camera is a [[single-lens reflex camera]] (SLR) which records images using electronic sensor instead of [[photographic film|film]]. Like SLRs, DSLRs are often used by professional photographers and advanced amateurs. |
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DSLR accepts interchangeable lenses and accessories such as [[flash (photography)|flash units]], and accessories for SLRs are usually compatible with DSLRs of the same brand. When aiming a DSLR, the photographer is looking through the lens (unlike a [[rangefinder camera]] or a camera with a separate [[viewfinder]]) and the image is projected optically (unlike a camera with an [[Electronic Viewfinder|electronic viewfinder]]). |
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{{R from initialism}} |
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{{R printworthy}} |
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The imaging sensor in a DSLR is typically much larger than the one in a standard [[digital camera]]. Larger sensor allows better image quality, shallower [[depth of field]] and wider [[field of view]]. However, the sensor is usually smaller than a frame of [[135 film]]. The average size of a typical DSLR sensor being about 22 mm x 15 mm, or the size of an [[Advanced_Photo_System|APS]] film frame. If this is not the case and the sensor is the same size as the equivalent frame of film (usually 35 mm wide), the camera is said to have a ''full-frame sensor''. Currently ([[2005]]) only some expensive professional DSLRs have full-frame sensors (typically 36 mm x 24 mm). One example of a full-frame DSLR is the Canon EOS-1Ds Mark II. |
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Depending on the position of the reflex mirror, the light from the scene can only reach either the [[eyepiece]] or the sensor. Also, a mechanical [[shutter]] is used to control the [[exposure]]. Therefore even though a DSLR has a color display at the back of the [[camera body]], it doesn't provide "live preview" (allowing [[focusing]] and [[framing]] using the display). The only exception to this rule so far is [[Canon EOS-20Da|Canon EOS 20Da]], a Japanese variant of [[Canon EOS-20D|Canon EOS 20D]] designed for [[astrophotography]]. |
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Camera manufacturers expect that professionals and advanced amateurs continue to prefer DSLRs over other forms of digitals cameras. However, if electronic viewfinders with near-zero lag and very low energy consumption are introduced, non-SLR cameras may become a viable choice for a large number of people who now need SLRs. |
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Many [[medium format]] SLRs can accept a [[digital camera back]] to turn the camera into a kind of DSLR with very high image quality. However, the combination is very expensive and bulky, and thus they are rarely used outside [[fashion]] photography and [[portraiture]]. |
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==Digital SLR versus Digital compacts== |
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What is the edge of Digital SLRs over non-SLR digital cameras?Non-SLR digitals are of 2 types.Digital compacts and SLR-like compacts(eg:Minolta DimageZ2, Nikon 5700),the latter type having lenses with large zoom capacity(10x-12x) which even vies some DSLRs. |
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In the conventional Film photography, SLR's biggest advantage over Rangefinders is the TTL(Through The Lens) viewing of the object of desire. In Rangefinders frame is seen via a prism, not through the focusing lens. However, the high-end non-SLR digitals (like the Nikon 5700), also offer TTL viewing through the focusing lens, projected onto its LCD screen. But, the image in the viewfinder of such non-SLR digitals are not TTL and suffers the same aberration of parallax error (what you shoot is not exactly what you see) as that of conventional film rangefinders. Entry level compact digital cameras offer only the viewfinder viewing. |
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The DSLRs can show you the exact frame in its viewfinder.Queerly,the LCD screen of a DSLR shows the snap only after you have shot it, but not before clicking!!! DSLRs allows for easy lens interchanges, which is not available in any non-SLR digitals. (High end rangefinder cameras of conventional Film photography allows lens interchange).DSLR is also faster(time from the clicking to sensor and then to store the snap onto the memory card) than digital compacts and this helpful in action photography. |
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The bottom line is that, DSLRs combine all the plus points of both film and digital photography. The cons are the bulk of the equipment and cost.DSLR also suffers "dust over the sensor"problem. |
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== See also == |
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*[[digital photography]] |
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[[Category:Digital photography]] |
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[[Category:Photographic equipment]] |
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[[he:DSLR]] |
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[[zh:數位單眼相機]] |
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Latest revision as of 18:36, 30 June 2024
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