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13  Slr
 

13 Slr

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    13  Slr 13 Slr Presentation Transcript

    • Single-lens Reflex Camera
    • SLR Camera
      • camera that uses a semi-automatic moving mirror system which permits the photographer to sometimes see exactly what will be captured by the film or digital imaging system
      • cameras allow the photographer to see the precise focus, color, framing, and brightness that will be recorded on film
    • Optical components of an SLR camera 1 - Front-mount lens 2 - Reflex mirror at 45degrees 3 - Focal plane shutter 4 - Film or sensor 5 - Focusing screen 6 - Condenser lens 7 - Optical glass pentaprism 8 - Eyepiece
    • History
      • 18 th Century
      • Johann Sturm (Germany) described first known use of a reflex mirror in a camera obscura.
      • The camera obscura was known to Aristotle as an aid in observing solar eclipses, but its use as an artist's aid
    • History
      • 19 th Century
      • Used glass plates or sheet film
      • first focal-plane shutter SLR
    • History
      • Early 20th century
      • first production 35 mm
      • first medium format roll film SLR
      • first pentaprism eyelevel viewing 35 mm SLR
    • Further Development of SLR
      • Large format SLR
      • describes large photographic films, large cameras, view cameras and processes that use a film or digital sensor, generally 4 x 5 inches or larger.
      • have adjustable fronts and backs that allow the photographer to better control rendering of perspective and depth of field.
    • Large format SLR
      • allow the front and/or back of the camera to be tilted out of parallel with each other, and to be shifted up, down, or sideways.
    • Medium format SLR
      • cameras making use of sensors larger than that of a 35 mm film frame
      • most widely used film size to a niche used by many professionals and some amateur enthusiasts
    • Medium format SLR
      • images of much higher resolution can be produced
      • usually limited to professional photography shops and very expensive
    • Advantages
      • viewing and focusing the image through the attached lens
      • provide photographers with precision and confidence
      • no parallax error, and exact focus can be confirmed by eye
      • very versatile
    • Disadvantages
      • cannot be made as small or as light as other camera designs
      • simple designs for wide angle lenses cannot be used
      • SLR mirror 'blacks-out' the viewfinder image during the exposure