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Calcium Filters

Calcium Filters

Calcium Filters


Calcium H (396nm) can be seen visual and also imaged. Calcium K (393nm) is an imaging only wavelength. Both offer detail of the low to mid chromosphere but prominences and detailed views of sunspots can also be captured. The H and K Lines are very sensitive to magnetic fields and offer a totally different view of the Sun. At its most simple, Calcium K can be captured easily with just a K Line filter in a White Light system. For more detailed views including prominences, Calcium modules tuned to the H or K lines can be fitted to almost any refractor.


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Baader Planetarium 1.25" Calcium-K Filter

£279.00 *
Not in stock

Lunt Solar B1200 Calcium K Filter for Refractors

£1,571.00 *

can be shipped within 1-2 days

Lunt Solar Calcium K Module for LS130Tha

£1,999.00 *

can be shipped within 14 days
Prices includes VAT, plus delivery