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

LUNT LS100FHa/B3400 H-alpha solar filter

Lunt LH100FHa H-Halpha

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LUNT LS100FHa/B3400 H-alpha solar filter

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12'222.8 CHF

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LUNT LS100FHa/B3400 H-alpha solar filter

100mm H-alpha solar filter system with B3400 blocking filter, for front mounting at telescopes with 2" focuser, and up to 3060mm 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 B3400 blocking filter, which is usable for telescopes up to 3060mm focal length. The blocking filter is installed in a straight extension tube for 2" focuser. This extension tube is equipped with a reception for 2" eyepieces and a adapter for 1.25" eyepieces.

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: B3400 in extension tube for 2" focuser
  • Maximum focal length of telescope: 3060 mm


  • LS100FHa solar filter
  • B3400 Blocking Filter (for 2" focuser) in extension tube
  • Transport case
  • Instruction manual