page contents

Lunt 60mm Ha Etalon Filter / B1200 Block 2"

can be shipped within 7-10 days

Price includes VAT, plus delivery

The LS60 Hydrogen-alpha filter system has a clear 60mm aperture (no central obstruction) integrally tuned etalon for use on any refractor telescope. The LS50 has an estimated bandwidth of <0.75 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 ~<0.55 Angstrom and offer higher contrast views of the Chromosphere.


Aperture: 60 mm (no central obstruction)

Bandwidth: <0.75 Angstrom

Tuning: Tiltable Etalon

Housing Diameter: 95 mm

Length: 85 mm

Weight: 0.85kg

Front Thread: M90x1 Female Thread

Rear Thread: M90x1 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, Lunt Solar