We recently received two fascinating images of the Sun from Christoph Schaefer. Along with these pictures, he also sent us a short article that briefs how he did it with his DMK 21AF04.AS Astronomy CCD Camera.

At the beginning of the article, he wrote:

A slidely modified H-alpha Telescope

A skywatcher ED100 telescope with100mm aperture/ 900mm focal lenght was modified for H-alpha observations. The original ED100 was shown to be highly corrected for the red light as published by Mr. Rohr, Germany.

[...]

Click the link below to download the complete document in pdf format:

"Some like it hot[...] DMK cameras reach the boiling sun"

Thanks Mr. Schaefer!