The solar filter system with 50 mm clear aperture (no central obstruction) for use on any refractor with 1.25" focusers and up to 540 mm focal length. Since the LS50FHa has a half-width of approximately <0.75 Angstrom, it is able to provide good contrast both for observations of the solar surface and for protuberances at the edge.
The system includes the B600 blocking filter, which is designed for telescopes with a focal length of up to 540 mm. The optionally available larger blocking filters are designed for longer focal lengths. The blocking filter is built into a 90° diagonal mirror for 1.25" focusers. This diagonal mirror is equipped with a mount for 1.25" eyepieces and a T2 camera connection.
By adding an optional double-stack etalon system, the half-value width can be reduced to approximately <0.55 Angstrom.
