The Baader Calcium K Line filter makes imaging of the sun in K line accessible to anyone with an ordinary telescope. The innovative double stacked filter uses sophisticated coatings to produce a sharp 8nm wide bandpass centered at 395nm.
Please note that this filter is for imaging use only and not safe for visual use. It is supplied with an A4 sheet of Baader Astrosolar (ND3.8). This Astrosolar is also not suitable for visual use, only imaging.
The Calcium-K filter is an ideal compliment to the 1.25" APM / Lunt Herschel Solar Wedge. The combination allows the highest possible quality images to be made using the filter. The combination is a fraction of the cost of Etalon based Calcium K or H-alpha solar scopes.