The stacked 1¼” K-Line Filter for digital cameras and webcams is used to take images of the Calcium-K Line of the solar spectrum. The filter shows both lines at 393nm and at 396nm. This results in a deepblue image. The Calcium-K lines reveal a part of the solar spectrum between the photosphere (visible in Whitelight) and the chromosphere (visible in H-alpha).
The Calcium-K solar atmosphere clearly shows faculae areas (bright zones and dense areas) dotted across the whole solar surface, predominantly around sunspots.
Best suited for Newton Mirror telescopes.
I want to congratulate you for having such a good filter at a very good price. Even if the sun was completely “clean” in white light, your CaK filter revealed some very nice detail.
Information about Baader Filters and FiltercellsDownload information-about-baader-filters.pdf