Manufacturer: Baader
Product number: BA2961590

EUR 285,00


incl. 19 % VAT (DE)  
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excl. 6.95 € shipping costs (DE)  
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Product expected to be available from 05.04.2024

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rating: 5.0 of 5
  • Details..
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  • In the box..
Baader K-Line filter 1.25" for solar photography in calcium light
Very clear imaging of flare areas in the deep blue spectral portion of sunlight.

Baader Calcium Solar Filter
The 1.25" filter for digital cameras and webcams to photograph the calcium line of the solar spectrum. The filter shows the two lines at 393 nm and 396 nm. This gives a deep blue image. The filter is especially suitable for Newtonian telescopes. A refractor should have a good correction in the blue spectrum.

This is a calcium filter for photographing the boundary layer between photosphere and chromosphere. Due to a special coating technology and lower half-width, no filter stacking is necessary!
With this Baader Gen II calcium filter, Baader has succeeded in offering the advantages of previous filters at a lower price. So the "blue sun" is now accessible to more observers than ever before.

What does the photo show?
In the light of the calcium lines a region of the sun becomes visible, which lies between the photosphere, which can be observed in white light, and the chromosphere visible in H-alpha light. Flares are scattered over the entire surface of the Sun, and bright zones and a condensed flare network are visible around groups of spots.




Direct comparison of the images to the Solar Continuum, which already offers a significant increase in contrast. The flare areas are clearly visible.



The photographic solar filter foil from Baader is necessary for light attenuation. Included is a 20x25 cm piece, from which you can build your own solar filter. Alternatively, we also offer ready-made solar filters with robust aluminum mounts. When ordering such a filter through the store, please specify that the filter should be equipped with the photographic foil. The visual foil (16x denser) would darken the sun image too much.

Important Observation Note
The calcium line is very close to the UV range which is harmful to eyes, so we do not recommend visual use. Eye damage may result. Photography, on the other hand, is harmless.
Filter diameter:1.25"
Substrate thickness:2 mm
Transmission wavelength:393 and 396 nm
Calcium line filter
20x25 cm piece of photographic AstroSolar film OD 3.8



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Reviews

Written by Michael Neumann
on 2021-06-01

"Hält was versprochen wird; wesentlich preisgünstigere Alternative zu anderen Systemen; Bild sehr dunkel, in Verbindung mit DSLR muss man sich mit Testaufnahmen an die richtige Belichtungszeit ran testen, meine Belichtungsautomatik kam scheinbar an ihre Grenzen."

Written by Cesar Pinheiro
on 2021-04-10

"Highly Recommended. Top*****"

Written by Roman Vanur
on 2017-07-01

Excellent

Written by Klaus Rockmann
on 2016-11-05

"Top Lieferung nach Bestellung umgehend Erhalten. Konnte den Filter schon mal Ausprobieren,bin zu frieden wenn ich auch noch mit der Anwendung Erfahrungen sammeln muss Mit sonnigen Grüßen"