Etalon Ha 100 mm Lunt pour double filtration sans BF renvoi coudé View larger

LUNT LS100FHa/B1800d1 H-alpha solar filter

Lunt LH100FHa H-Halpha

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LUNT LS100FHa/B1800d1 H-alpha solar filter

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10'882.1 CHF

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LUNT LS100FHa/B1800d1 H-alpha solar filter

100mm H-alpha solar filter system with B1800 blocking filter, for front mounting at telescopes with 1.25" focuser, and up to 1620mm focal length.

The LS100FHa H-alpha Etalon filter system with 100mm aperture for use on any refractor and many other telescopes. Because the LS100FHa has an estimated bandwidth of <0.7 Angstrom it is capable to providing high contrast views of both solar surface and edge detail (prominences).
The system includes the B1800 blocking filter, which is usable for telescopes up to 1620mm focal length. Larger blocking filters suitable for longer focal length are also optional available. The blocking filter is installed in a 90° star diagonal for 1.25" focuser. This diagonal is equipped with a reception for 1.25" eyepieces and a T2 camera connection.

Adding an additional available double-stack Etalon system will reduce the bandwidth to ~<0.5 Angstrom.


  • Aperture: 100 mm
  • Bandwidth: <0.7 Angstrom
  • Tuning: tiltable Etalon
  • Housing diameter: 162 mm
  • Length: 101 mm
  • Weight: 2.75 kg
  • Front thread: M120x1.5 female thread
  • Rear thread: M120x1.5 male thread
  • Blocking filter: B1800 in diagonal for 1.25" focuser
  • Maximum focal length of telescope: 1620 mm


  • LS100FHa solar filter
  • B1800 Blocking Filter (for 1.25" focuser) in star-diagonal
  • Transport case
  • Instruction manual