60mm Ha Etalon-Filter-System with B1200 blocking filter for 2'' focuser
LS60FHa Main Filter
B1200 Blocking Filter (for 2" focuser) in star-diagonal
The LS60 Hydrogen-alpha filter system with 60mm aperture (no central obstruction) integrally tuned etalon for use on any refractor and many other telescopes. Because the LS60FHa has an estimated bandwidth of <0.7 Angstrom it is capable to providing high contrast views of both surface and edge detail.
The system includes the B1200 blocking filter, which is usable for telescopes up to 1080mm 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 2" 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.
These H-alpha filters have full 60 mm clear aperture without obstruction, despite its size! The bandwidth is <0.7 Angstrom, with double-stacking you get <0.5 Angstrom. The filters are installed in the same housing as the smaller LS50FHa filters and can also be combined with the 60 mm LS60THa telescopes.