Product Description

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.

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  Information about Baader Filters and Filtercells

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