Baader 1¼” K-Line Filter 395nm

Includes 19% VAT
Delivery Time: approx. 2-3 workdays

K-Line Filter delivery includes 1x AstroSolar Photo Film 20x30cm, ND 3.8 to prefilter the sunlight.

The K-Line Filter may NEVER BE USED without PREFILTERING the sunlight

A visual observation with the K-Line Filter is not possible, because the eye is practically blind in this spectral range
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Item No.: 2458355.
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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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