Ajax Scientific double Bi-concave lens. Made of polished glass with ground edges. Used for reducing the size of speading out light, with two inward curving symmetrical faces. 50-millimeters diameter. 250-millimeters focal le...

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Ajax Scientific double Bi-concave lens. Made of polished glass with ground edges. Used for reducing the size of speading out light, with two inward curving symmetrical faces. 50-millimeters diameter. 250-millimeters focal length.

  • Ajax Scientific double Bi-concave lens
  • Made of polished glass with ground edges
  • Used for reducing the size of speading out light, with two inward curving symmetrical faces
  • 50-millimeters diameter
  • 250-millimeters focal length
  • Ajax Scientific double Bi-concave lens
  • Made of polished glass with ground edges
  • Used for reducing the size of speading out light, with two inward curving symmetrical faces
  • 50-millimeters diameter
  • 250-millimeters focal length

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