Lunt Solar Systems Filters Ca-K module with 12mm blocking filter in extension tube for 2" focuser (15953)
97596.99 ₴
Tax included
Calcium K (Ca-K) telescopes and filters are specialized tools for observing the Sun at the 393.4 nm wavelength, a region just at the edge of the visible spectrum. This emission line, produced by calcium, allows astronomers to study layers of the Sun that are slightly lower and cooler than those seen in Hydrogen-alpha. The Ca-K line highlights super granulation cells, which appear brightest in areas of strong magnetic activity such as sunspots and active regions.