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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