Tag: Stephen Ramsden

Image 3: Sunspot complex through the Calcium K module on the Explore Scientific ED80CF. Taken with the QHY5L-II and a TeleVue 2.5X PowerMate.
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Lunt Calcium K Filter

The Lunt Calcium K filter is a specialized solar filter designed to observe and image the Sun’s chromosphere, specifically the spectral line known as the “Calcium K” line. This filter is used in solar astronomy to reveal detailed features and activity occurring in the Sun’s chromosphere, which is the layer […]