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Lunt Solar CaK Filter
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Calcium K (Ca-K) Telescopes and Filters are used to study the wavelength of 393.4nm. This emission line is one of two that are produced by Calcium just at the edge of the visible spectrum in a layer that is slightly lower and cooler than the layer viewed in Hydrogen-alpha. The emission line displays areas of Super Granulation Cells that are brightest and strongest in areas of high magnetic fields such as sunspot activity and active regions. Having the ability to study the Calcium K and the Hydrogen-alpha line provides important insights into the structure, strength, and depth of these active regions.
The Calcium K line is centered at 393.4nm. This wavelength is considered to be slightly outside the visible spectrum on the UV side. While most people can visually see the violet color of the wavelength, many cannot resolve the contrast due to yellowing of the cornea. People who have had cataract surgery are often able to see considerable detail. But, it is for these reasons that the Ca-K line is typically studied via the use of cameras which are able to provide stunning details.
Internal narrowband filters allow for a <2.4 Angstrom bandpass. Primarily an imaging system due to the difficulty of many to visually see everything that CaK has to offer.
CaK Module Packages
The Lunt CaK Modules are available in several variations. Below is a list of options and their prices:
LS6CaKMDd
* Calcium Module with B600 Blocking Filter in Star Diagonal with T2 Connection. For telescopes up to 100mm aperture and 600mm focal length
Retail Price: US$718.00
LS6CaKMDs
* Calcium Module with B600 Blocking Filter in Extension Tube with T2 Connection. For telescopes up to 100mm aperture and 600mm focal length
Retail Price: US$718.00
LS12CaKMDd
* Calcium Module with B1200 Blocking Filter in Star Diagonal with T2 Connection. For telescopes up to 100mm aperture and 1200mm focal length
Retail Price: US$1,018.00
LS12CaKMDs
* Calcium Module with B1200 Blocking Filter in Extension Tube with T2 Connection. For telescopes up to 100mm aperture and 1200mm focal length
Retail Price: US$1,018.00
LS18CaKMDd
* Calcium Module with B1800 Blocking Filter in Star Diagonal with T2 Connection. For telescopes up to 100mm aperture and 1800mm focal length
Retail Price: US$1,194.00
LS18CaKMDs
* Calcium Module with B1800 Blocking Filter in Extension Tube with T2 Connection. For telescopes up to 100mm aperture and 1800mm focal length
Retail Price: US$1,194.00
LS34CaKMD
* Calcium Module with B3400 Blocking Filter in Extension Tube with T2 Connection. For telescopes up to 100mm aperture and 3400mm focal length
Retail Price: US$2,034.00
These part numbers can be looked up in the Price List or call for more information.
Optional Accessories: (see “accessories“)
- Sun Finder: “TeleVue Sol Searcher“.
- Eyepiece: “Lunt Zoom Eyepiece“.
Pre-orders will be shipped in the order they are received.
Prices are subject to change without notice.
Customer Solar Images:
- Larry Alvarez
- Andreas Murner
- Brian Colville
- Enes Delijanin
- Dirk Lucius
- Eduard Garcia Ribera
- Your image gallery here?
No one brings you closer to our nearest Star than Lunt Solar Systems… the next generation of Solar Instrumentation.
About Lunt Solar Systems LLC…
Lunt Solar Systems is a manufacturing and sales facility located in Tucson, Arizona. Lunt Solar designs, fabricates, assembles, and tests solar telescopes and solar filters. Whether you are looking for a dedicated solar telescope or a solar filter for attachment to your own astronomy telescope, we can help. Solar telescope models start at $598 for an LS35THa (telescope) or the only slightly more expensive LS50FHa (filter), all the way thru the 152THa Solar Telescope. Solar observing is both fun and educational. Don’t miss out on Solar Maximum.
June 21st, 2011 at 6:09 am
Sirs,
I am interested in your CaK equipment for my Stellarvue 80mmED telescope. Do you have one that might be “loaned” or used as a demonstrator model, so I can see if my eyes are sensitive enough for CaK viewing. I’m not interested in imaging, strictly visual.
Thanks,
Larry
Louisiana
July 2nd, 2011 at 10:51 am
Larry,
I do not have any demo CaK modules at the current time. CaK is fairly difficult for most people to see as it sits on the far UV side of the spectrum so it is mainly an imaging filter.
July 7th, 2011 at 5:53 pm
Hello.
I’m interested in the LS18CaKMDs2 CaK module for imaging with 100mm f/12 achro, 115mm f/7 apo and 80mm f/6 apo refractors. Do you know if there would be any difficulty using a field flattener or focal reducer (or a barlow, for that matter) on the camera side of the module? Are f/6 and f/7 too fast for the narrow spectral bandpass?
Thanks,
Peter,
Winnipeg, Canada.
August 20th, 2011 at 1:27 am
Hello.
I ordered for LS18CaKMDs2 in US dealer OPT in March, 2011.
However, the time for delivery of LS18CaKMDs2 is not told to me.
However, even if I ask OPT, there is no exact reply.
Please inform me of the time for delivery of CaKMD from LUNT.
Sincerely yours
fom JAPAN.
April 7th, 2012 at 9:20 pm
I have a 60mm Lunt with a BF1200…would I just replace my 1200 with this Calcium filter?
BTW what happened to recent questions? I posted two to the Lunt forums in the last 3 weeks and I noticed both questions were gone?