L-eXtreme Filter 1.25"

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Specification :

  • Substrate: B270.
  • Thickness: 1.85mm.
  • FWHM: O37nm+Ha 7nm.
  • Blocking range: 300 to 1000nm.
  • Blocking depth: light pollution line blocking >99%.
  • Surface quality: 60/40.
  • Transmitted Wavefront RMS: λ/4.
  • Parallelism: 30s.
  • Tpeak:  T>90

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