From French gourp: Sol’Ex will allow you to observe the surface of our Star in various spectral lines: hydrogen, calcium and many other ones. Sol’Ex is a very compact astronomical instrument, weighting less than 500 grams, easy to install on your refracting telescope, this to take spectacular images of the Sun surface.
It is a complete, fun, progressive project, accessible to any curious individual, ideal to run within an astronomy club, or even to introduce young people to the spectroscopy marvels in a science class at middle/high school.
Original link: Sol’Ex: Objective-en (astrosurf.com)
I’m still working on the reproduction of SolEX spectrometer with the optical lens available in China. Now I stuck because the 3d printing supporting friends is preparing for his exams. Some of my chinese friends has been successfully built it, and I will update my progress here later.
