Digital single lens reflex camera Wikipedia.A digital single lens reflex camera also called a digital SLR or DSLR is a digital camera that combines the optics and the mechanisms of a single lens reflex camera with a digital imaging sensor, as opposed to photographic film.The reflex design scheme is the primary difference between a DSLR and other digital cameras.In the reflex design, light travels through the lens, then to a mirror that alternates to send the image to either the viewfinder or the image sensor.The traditional alternative would be to have a viewfinder with its own lens, hence the term single lens for this design.By using only one lens, the viewfinder of a DSLR presents an image that will not differ substantially from what is captured by the cameras sensor.A DSLR differs from non reflex single lens digital cameras in that the viewfinder presents a direct optical view through the lens, rather than being captured by the cameras image sensor and displayed by a digital screen.XXZLfIAksgNdpuj.standard' alt='Canon Powershot S5 Is Update Free' title='Canon Powershot S5 Is Update Free' />DSLRs largely replaced film based SLRs during the 2.DSLRs remain the most common type of interchangeable lens camera in use as of 2.Design of DSLR cameraseditLike SLRs DSLRs typically use interchangeable lenses1 with a proprietary lens mount.Iridient Developer Version History.March 3, 2017 Maintenance Release New Features Support added for RAW images from the Canon G9 X Mark II and EOS M6.A movable mechanical mirror system 2 is switched down exact 4.Most of the entry level DSLRs use a pentamirror instead of the traditional pentaprism.Focusing can be manual, by twisting the focus on the lens or automatic, activated by pressing half way on the shutter release or a dedicated AF button.To take an image, the mirror swings upwards in the direction of the arrow, the focal plane shutter3 opens, and the image is projected and captured on the image sensor4, after which actions, the shutter closes, the mirror returns to the 4.Compared with the newer concept of mirrorless interchangeable lens cameras, this mirrorprism system is the characteristic difference providing direct, accurate optical preview with separate autofocus and exposuremeteringsensors.Essential parts of all digital cameras are some electronics like amplifier, analog to digital converter, image processor and other micro processors for processing the digital image, performing data storage andor driving an electronic display.Phase detection autofocuseditDSLRs typically use autofocus based on phase detection.This method allows the optimal lens position to be calculated, rather than found, as would be the case with autofocus based on contrast maximisation.Phase detection autofocus is typically faster than other passive techniques.As the phase sensor requires the same light going to the image sensor, it was previously only possible with an SLR design.However, with the introduction of focal plane phase detect autofocusing in mirrorless interchangeable lens cameras by Sony, Fuji, Olympus and Panasonic, cameras can now employ both phase detect and contrast detect AF points.Features commonly seen in DSLR designseditMode dialeditDigital SLR cameras, along with most other digital cameras, generally have a mode dial to access standard camera settings or automatic scene mode settings.Sometimes called a PASM dial, they typically provide modes such as program, aperture priority, shutter priority, and full manual modes.Scene modes vary from camera to camera, and these modes are inherently less customizable.They often include landscape, portrait, action, macro, night, and silhouette, among others.However, these different settings and shooting styles that scene mode provides can be achieved by calibrating certain settings on the camera.Professional DSLRs seldom contain automatic scene modes as professionals often do not require these and professionals know how to achieve the looks they want.Dust reduction systemseditA method to prevent dust entering the chamber, by using a dust cover filter right behind the lens mount, was used by Sigma in its first DSLR, the Sigma SD9, in 2.Olympus used a built in sensor cleaning mechanism in its first DSLR that had a sensor exposed to air, the Olympus E 1, in 2.Several Canon DSLR cameras rely on dust reduction systems based on vibrating the sensor at ultrasonic frequencies to remove dust from the sensor.Interchangeable lenseseditThe ability to exchange lenses, to select the best lens for the current photographic need, and to allow the attachment of specialised lenses, is one of the key factors in the popularity of DSLR cameras, although this feature is not unique to the DSLR design and mirrorless interchangeable lens cameras are becoming increasingly popular.Interchangeable lenses for SLRs and DSLRs also known as Glass are built to operate correctly with a specific lens mount that is generally unique to each brand.A photographer will often use lenses made by the same manufacturer as the camera body for example, Canon EF lenses on a Canon body although there are also many independent lens manufacturers, such as Sigma, Tamron, Tokina, and Vivitar that make lenses for a variety of different lens mounts.There are also lens adapters that allow a lens for one lens mount to be used on a camera body with a different lens mount but with often reduced functionality.Many lenses are mountable, diaphragm and meter compatible, on modern DSLRs and on older film SLRs that use the same lens mount.However, when lenses designed for 3.DSLRs with smaller sized sensors, the image is effectively cropped and the lens appears to have a longer focal length than its stated focal length.Most DSLR manufacturers have introduced lines of lenses with image circles optimised for the smaller sensors and focal lengths equivalent to those generally offered for existing 3.DSLRs, mostly in the wide angle range.These lenses tend not to be completely compatible with full frame sensors or 3.Canon EF S lenses, interfere with the reflex mirrors on full frame bodies.HD video captureeditSince 2.DSLRs which offer a movie mode capable of recording high definition motion video.A DSLR with this feature is often known as an HDSLR or DSLR video shooter.The first DSLR introduced with an HD movie mode, the Nikon D9.Other early HDSLRs capture video using a nonstandard video resolution or frame rate.For example, the Pentax K 7 uses a nonstandard resolution of 1.The Canon EOS 5. 00.D Rebel T1i uses a nonstandard frame rate of 2.In general, HDSLRs use the full imager area to capture HD video, though not all pixels causing video artifacts to some degree.Compared with the much smaller image sensors found in the typical camcorder, the HDSLRs much larger sensor yields distinctly different image characteristics. Cara Hack Facebook Tanpa Email Dan Password there. HDSLRs can achieve much shallower depth of field and superior low light performance.However, the low ratio of active pixels to total pixels is more susceptible to aliasing artifacts such as moire patterns in scenes with particular textures, and CMOS rolling shutter tends to be more severe.Furthermore, due to the DSLRs optical construction, HDSLRs typically lack one or more video functions found on standard dedicated camcorders, such as autofocus while shooting, powered zoom, and an electronic viewfinderpreview.These and other handling limitations prevent the HDSLR from being operated as a simple point and shoot camcorder, instead demanding some level of planning and skill for location shooting.Video functionality has continued to improve since the introduction of the HDSLR, including higher video resolution such as 1.Blu ray disc mastering6 or Digital Cinema Initiatives DCI.The Canon EOS 5. D Mark II with the release of firmware version 2.Panasonic Lumix GH1 were the first HDSLRs to offer broadcast compliant 1.The rapid maturation of HDSLR cameras has sparked a revolution in digital filmmaking, and the Shot On DSLR badge is a quickly growing phrase among independent filmmakers.Canons North American TV advertisements featuring the Rebel T1i have been shot using the T1i itself.An increased number of films, documentaries, television shows, and other productions are utilizing the quickly improving features.One such project was Canons Story Beyond the Still contest that asked filmmakers to collectively shoot a short film in 8 chapters, with each chapter being shot over a short period of time and a winner was determined for each chapter.After 7 chapters the winners collaborated to shoot the final chapter of the story.
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