Lunt Solar Systems Ca-K Module with 18mm blocking filter in extension tube for 2" focuser (15911)
2711.61 $
Tax included
Calcium K (Ca-K) Telescopes and Filters are specialized instruments used to observe the Sun at the 393.4 nm wavelength. This emission line, produced by calcium, is located just at the edge of the visible spectrum and corresponds to a solar layer that is slightly lower and cooler than the one observed in hydrogen-alpha light. Observing the Ca-K line highlights super granulation cells, which are most prominent in areas with strong magnetic fields such as sunspots and active solar regions.