Moravain G2-8300FW ; TL APO 80/480, 18x600s L, 6x600s for every channel in RGB, 4x600s Halpha
Gurk, 2. July 2014

M20, the Trifid Nebula in constellation Sagittarius. Distance 1600 ly. Red = emission nebula, blue = reflection nebula full field annotated Halpha