Lunt Solar Systems Filters Ca-K module with 6mm blocking filter in star diagonal for 2" focuser (15925)
7877.97 AED
Tax included
Calcium K (Ca-K) telescopes and filters are specialized instruments designed for observing the Sun at the 393.4 nm wavelength. This emission line, produced by calcium, lies just at the edge of the visible spectrum in a region that is slightly lower and cooler than the one observed in Hydrogen-alpha. The Ca-K line is especially useful for studying super granulation cells, which appear brightest in areas with strong magnetic fields, such as sunspots and active regions.