21 June 2026
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  • [ 10 June 2026 ] Caught in the act: the wind that could kill a galaxy News
  • [ 4 June 2026 ] Europe’s Mars rover may land in the remains of a vast ancient water system News
  • [ 14 April 2026 ] Moon dust preserves record of life’s building blocks News
  • [ 11 April 2026 ] Dark matter may come in multiple forms, new model suggests News
  • [ 2 April 2026 ] Witness to history: Artemis II, lunar exploration and hope News
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Optical Vision Ltd.

Equipment

3× four-element Barlow lens

12 May 2015 Steve Ringwood

Steve Ringwood investigates a 4-element, 3x Barlow lens that’s designed to provide efficient field correction and apochromatic performance that can match other highly specified optics in the light path.

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News Headlines

  • Caught in the act: the wind that could kill a galaxy
    10 June 2026
  • Europe’s Mars rover may land in the remains of a vast ancient water system
    4 June 2026
  • Moon dust preserves record of life’s building blocks
    14 April 2026
  • Dark matter may come in multiple forms, new model suggests
    11 April 2026
  • Witness to history: Artemis II, lunar exploration and hope
    2 April 2026

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