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Lunt 100mm Ha Etalon Filter / B1200 Block 2"

Lunt 100mm Ha Etalon Filter / B1200 Block 2"

can be shipped within 7-10 days

Price includes VAT, plus delivery

The LS100 Hydrogen-alpha filter system has a 100mm aperture integrally tuned etalon for use on any refractor telescope. The LS100 has an estimated bandwidth of <0.7 Angstrom and therefore capable of providing high contrast views of both Prominence and Chromosphere detail.

The system includes a B1200 blocking filter, which is suitable for most telescopes up to 1080mm focal length. Larger blocking filters suitable for longer focal length are also optionally available. Please ask us for details as blocking filter size is affected by the application of the scope i.e. observing or imaging.

The blocking filter is installed in a 90° star diagonal for use with a 2" focuser. This diagonal is equipped with a reception for 1.25" eyepieces and a T2 camera connection. Adding an additionally available Double-Stack etalon filter will reduce the bandwidth to ~<0.5 Angstrom and offer higher contrast views of the Chromosphere.


Aperture: 100 mm

Bandwidth: <0.7 Angstrom

Tuning: Tiltable Etalon

Housing Diameter: 162 mm

Length: 101 mm

Weight: 2.75 kg

Front Thread: M90x1 Female Thread

Rear Thread: M120x1.5 Male Thread

Blocking filter: B1200 in diagonal for 2" focuser

Maximum Recommended Focal Length of Telescope: 1080 mm

Browse these categories as well: Front Hydrogen Alpha FIlters, Hydrogen Alpha Filters