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A cylindrical piece of glass or plastic that receives and focuses light to form an image. Most cameras list an f-number and focal length for each lens.

  • F-Number: Indicates the size of the lens opening (aperture).
  • Focal Length: The distance between the image sensor and the optical center of the lens.
  • Lens Adapter: Allows photographers to use special lens attachments (Macro, Zoom, Filters, etc.) on certain cameras.
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