DayStar Filters are the academic standard in narrow bandpass astronomical solar filters.  For decades, professional observatories and universities worldwide have counted on the superior quality and performance of DayStar filters.  They can be found in the world's major educational institutions and research facilities, both terrestrial and flown. These Filters are State of the Art Today, and will Amaze in results.

Hydrogen-Alpha isn't the only filter available either. Now you can see the Sun through a Calcium II K-line, perfectly suited for academic studies in mapping the 3-dimensional structure of the Chromosphere. By controlling wing shift of the Ca II K line filter with precision accurate to 0.1Å,  The Calcium II H-line for visual observations, however, is much closer to the visual spectrum and much higher contrast in high contrast violet color.  The Sodium Na D-line will give you the ability to see impulsive-phase flare eruption kernels. Na D is a low excitation line emitted when the low chromosphere is heated, usually at footpoints of flux loops passing through a flare, as sodium D line reflects the lower chromosphere.

All Hydrogen-Alpha filters are to be used with a lens cover and an Energy Rejection Filter.