At 7200 light years away M4 is one of the closest globular cluster to us. It's located low in the summer sky just to the right of Antares, the bright reddish star that is the heart of Scorpius. M4 would be a spectacular globular if it were not for a lot of interstellar material that lie between it and us. That dark material significantly reddens and dims the light from this cluster. In addition, its low position in the sky (for mid latitude northern observers) further dims its glory. Still, it appears as one of the largest globulars, easily visible with binoculars. In moderate telescopes its stars extend at least a 1/2 degree from the core, larger than the diameter of the full moon. It apparent size and visibility are due to it's relative closeness to us, but n fact it's one of the smaller, about 75 light years across, and more loose and open globulars. It's also one of the oldest, with the majority of its stars over 13 billion years old, nearly the estimated age of our galaxy.

10" F6.3 Schmidt Cassegrain Telescope, (1600mm F.L.)  Canon 300D camera placed at the scope's prime focus
4 photos aligned and averaged together, then brightness, color, and contrast enhanced.
Each photo, 180 seconds exposure at ISO 800