Astroshop.eu has today released the free Astronomy Ebook “Telescope 101: An introduction to the world of telescopes” by author and amateur astronomer Marcus Schenk. In 11 chapters and 67 pages Schenk guides us into the world of telescopes and provides some expert advice for beginners.

Schenk shows us the advantages and disadvantages of different telescope designs, illustrates various components and explains optical aberrations. We are sure that it will be useful for you, even if you have just a passing interest in astronomy!