The_Video_Camera

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The_Video_Camera Powered By Docstoc
					Media Journal
   Describe your personal experience using a
    video camera.
The Video Camera
Basic Elements and Camera Care
GLSHS Video Cameras
   Panasonic GS-14
   Panasonic GS300
   Panasonic AG-DVC7
   Canon ZR-800
   Canon FS200
   Canon GL-1
   Canon GL-2
Basic Camera Function
   Regardless of their size, cost, and quality,
    all video cameras operate on the same
    principle:
       to translate the optical image that the lens sees
        into a corresponding video picture.
Three Basic Elements
   To fulfill the basic camera function, each
    video camera needs three basic elements:
       The lens                 Viewfinder

       The camera itself
       The viewfinder                    Camera




                                   Lens
The Lens
   The lens selects a portion of the scene at which
    you point the camera and produces a sharp
    optical image of it.
       Classified by focal length, which is a technical
        measure of the distance from the iris inside the lens
        to the place where the projected image is in focus.
       Usually measured in millimeters (mm)
       Also classified as a wide-angle or narrow-angle lens
Zoom Lens
   The zoom lens on a camera can change
    from a wide-angle position to a narrow-
    angle position in one continuous move.
       Because the zoom lens offers a great variety of
        focal lengths between its extreme wide-angle
        and narrow-angle positions, it is also called a
        variable-focal-length lens.
Zoom Range (Zoom Ratio)
   Refers to how close a view you can
    achieve when zooming in from the farthest
    wide-angle position to the closest narrow-
    angle position.
       The higher the first number of the ratio, the
        closer you can get to the object from the farthest
        wide-angle position.
       Ex. 20:1
The Camera
   The first main component within the
    camera itself is the Beam Splitter, which
    separates ordinary white light into the three
    primary light colors- red, green, and blue.
The Camera
   The second main component inside the camera is
    the Imaging Device. It changes light into electric
    energy.
   The imaging device in all cameras is a CCD.
    (Charge-coupled device or “Chip”)
       Contains horizontal and vertical rows of thousands or
        millions of light-sensing pixels.
       High quality consumer and all professional cameras
        contain three CCDs- one for each of the light beams
        delivered by the beam splitter.
The Viewfinder
   A small video monitor attached to the
    camera that shows an image of what the
    camera sees. Most cameras have:
       An adjustable viewfinder tube
       A flat-panel LCD (liquid crystal display)
        viewfinder that can be folded out and reversed
Camera Care
   Don’t expose the camera to the elements.
       Never leave it in the hot sun or a hot car or in a
        car when it is cold outside.
       Watch so the viewfinder is not pointed into the
        sun; the magnifying glass in the viewfinder can
        collect the sun’s rays and melt the electronics.
       Use a large umbrella when shooting in the rain or
        extreme cold.
Camera Care
   Leave the camera with care.
       Never leave the camera unattended especially while on a
        tripod.
       When putting the camera down, place it upright. Laying it
        on its side may damage the viewfinder or attached
        microphone.
       Detach the camera from the tripod when transporting the
        equipment.
       Only Broadcast students are permitted to use the class
        video cameras.
Camera Care
   Use the lens cap.
       The lens cap protects the delicate front surface
        of the lens.
       Never touch a lens with your bare fingers.
       Never use a cloth or tissue moistened with saliva
        to wipe a lens clean. Saliva ruins the lens.
       Use compressed air from a can to blow dirt off a
        lens. Never try to blow the dirt off with your
        breath.
Camera Care
   Use fully charged batteries.
       Some batteries develop a “memory,” which
        means they signal a full charge even when only
        partially charged.
       Do not drop batteries or expose them to extreme
        heat or cold.
Camera Care
   Verify the tape format.
       All GLSHS cameras use Panasonic MiniDV
        tapes. Other brands of tapes such as TDK can
        get caught in the camera and ruined.
       Review the previous footage on the tape before
        recording so that you do not record over
        important footage.
Camera Care
   Examine all connections.
       Make sure the microphone jack is fully
        connected.
       When importing to a computer, make sure the
        USB or Firewire cable is connected securely.
Camera Care
   Test the camera.
       Even when in a hurry, always do a brief test
        recording to verify the camcorder operates
        properly.
       Bring headphones to check the audio.
       Check the full range of the zoom lens and focus.
Camera Care
   Heed the warning signs.
       Take note of caution signals and try to address
        the problem immediately.
       For example, you cannot ignore a “low battery”
        warning.
Camera Care
   Put all tools away properly.
       Remove tripod plate and return to tripod.
       Remove batteries and place on designated
        charger.
       Place the camera in the camera bag and make
        sure ALL clasps are closed.
       Notify Mrs. Houck if you experience any
        problems or issues while filming so that the
        camera can be diagnosed and fixed.

				
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posted:5/12/2011
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