#camera_lens__optical_lens  a lens that focuses the image in a camera
  supertype:  lens_system__lens  a transparent optical device used to converge or diverge transmitted light and to form images
  part of:  photographic_camera  television_camera
  subtype:  closeup_lens  a photographic lens with a short focal length used to take pictures at short ranges
  subtype:  portrait_lens  a compound camera lens with a relatively high aperture
  subtype:  telephoto_lens__zoom_lens  a camera lens that magnifies the image
  subtype:  wide-angle_lens__fisheye_lens  a camera lens having a wider than normal angle of view (and usually a short focal length); produces an image that is foreshortened in the center and increasingly distorted in the periphery

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