Light, Lens,

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Light, Lens, Zoom

• Digital Photography
• Apollo Technology Education

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Visible Light
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Prisms Seperating the Colors
Prism breaks white light into the colors of the
visible light spectrum
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Check out that Reflection.

• The Sun is a natural source for visible light
  waves and our eyes see the reflection of this
  sunlight off the objects around us.
• The color of an object that we see is the color
  of light reflected. All other colors are
  absorbed.

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The Human Eye
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Camera

• Definition a device that consists of a
  lightproof chamber with an aperture fitted with a
  lens and a shutter through which the image of an
  object is projected onto a surface for recording
  (as on film) or for translation into electrical
  impulses (as for digital cameras)

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The Camera
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Lens

• Definition a ground piece of glass used to
  gather and focus light. Can be singular or a
  series of lenses.

Note focal length measured in mm (millimeters)
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Optical Zoom

• Definition A series of lenses that changes the
  focal length to magnify the image.

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Lens Cutaway
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Lens Cutaway
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Digital Zoom

• Definition The camera takes pixels from the
  center of the image sensor and stretches them or
  interpolates them to make an enlarged image.
• Bad Zoom
• Avoid it!
• Turn it off!

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Optical vs. Digital Zoom
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Dont be Fooled!