M4 is a large, bright and very loose globular cluster in Scorpius. Being situated less than 2 degrees west of the bright star Antares (the right orange star) it is easy to find. Visible to the naked eye, it is easily resolved in an 4" telescope.

The region around M4 abounds with interesting objects. There are both bright and dark nebulae, double stars, and another globular cluster, NGC 6144. This is an easy object of an 8" telescope.

45 minutes exposure, Kodak Ektachrome 200 slide film.
5" f/5 refractor, prime focus.

30 minutes exposure on Fuji Super HG V 400 film.
300mm f/6 newtonian, prime focus.

3 minutes exposure, Meade 416XTE CCD.
8" f/6 newtonian at prime focus.

Combination of 10, 1 minute exposures, SBIG ST9XE CCD camera.
300mm f/6 newtonian telescope at prime focus.

Combination of 20, 1 minute exposures, SBIG STL-1001E CCD camera.
300mm f/6 newtonian telescope at prime focus.