Transform your normal astronomical telescope into a Ca-K solar telescope simply by putting the Ca-K module into the 2" focuser of your telescope.
Internal narrowband filters allow for a <2.4 Angstrom bandwidth. The Ca-K wavelength is at the edge of the visible light spectrum for human eyes, so for many people visual observing is difficult therefore the Ca-K module is primarily optimised for imaging where all Ca-K details can be captured.
The Ca-K module is in a 90° star diagonal for 2" focusers. The eyepiece side accepts 1.25" eyepieces and also has a T2 connection.
IMPORTANT: Only for use with refractor telescopes up to 100mm aperture. The refractors must not have corrector lenses at the back. Optical elements like corrector lenses or secondary mirrors of reflector telescopes become very hot by the concentrated solar energy and could be damaged.
Calcium K (Ca-K) telescopes and filters are used to study the wavelength of 393.4 nm. 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 centred at 393.4 nm. 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.
Choose the best CaK Module for your Telescope Size and Focal Length:
B600: For telescopes up to 100mm aperture and 540mm focal length
B1200: For telescopes up to 100mm aperture and 1080mm focal length
B1800: For telescopes up to 100mm aperture and 1620mm focal length