Filters 50mm Ha Etalon filter with B1200 for 2" focuser

The LS50 H-alpha system with a diameter of 50 mm (no central obstruction) for use with any refracting telescope and most other telescopes. The system includes blocking filters, whereby the B1200 blocking filter is designed for telescopes with a focal length of up to 1080 mm. The larger blocking filters are designed for longer focal lengths.

Because the LS50 has an estimated bandpass of <0.70 Angstroms it is capable of providing high contrast views of both surface and edge detail. Adding an additional etalon system will reduce the bandpass to ~<0.50 (dependant upon scope) allowing for higher resolution viewing and/or imaging.