Composite Calcium-H and H-alpha Sun
7 September 2026
Both the upper (red) and lower (blue) solar chromosphere
is shown
in the above composite image.
AP130 + Coronado SM90 H-alpha filter
QHY533M
AP110 + MLAstro700 SHG Ca-K line
QHY 5III 678M
Copyright Peter J Ward 2026