To see the faint detail in this image, adjust your monitor's brightness and contrast to clearly show all 17 steps in this grayscale chart:
This very poor image of M20 suffers from soft focus, coma, elongated stars, and severe chromatic aberration. It is placed here as a reminder for me to shoot this beautiful emission & reflection nebula again when I've resolved the problems with my C11 telescope, focal reducer lens and camera system. I tried to patch-up this image in Photoshop, but the injuries were severe and I couldn't do much for the patient.
So for now, just step back from your computer's monitor about 20 feet, turn out the lights, and enjoy this object's splendid colors!