To take photos like the image of the Sun in that article you need a telescope coupled with a Hydrogen Alpha filter, mounted to your SLR body. Hydrogen Alpha fil

To take photos like the image of the Sun in that article you need a telescope coupled with a Hydrogen Alpha filter, mounted to your SLR body. Hydrogen Alpha filters are rather expensive, unfortunately. Take a look at this Wiki article: http://en.wikipedia.org/wiki/H-alpha#Filter http://en.wikipedia.org/wiki/H-alpha#Filter