M12 is just above and to the right of  M10 and is bit harder to see. It's a little further away at 16,000 light years and not quite as wide at 75 light years. It's also a little less dense around the core. It's an old cluster, and much like M10 most of the stars except the tiniest ones have fused into Helium most of their hydrogen. There are many in the end phase, plus a number of blue stars are now burning helium. Both M12 and M10 can be found a few degrees below the celestial equator and just a bit to the right of the summer time Milky Way.

11", Celestron EdgeHD, F10, modified Schmidt Cassegrain Telescope, 2800mm F.L.  Canon Ra camera at prime focus
8 photos aligned and averaged together, then brightness, color, and contrast enhanced. Click on photo above for a  full rez image.
Each photo, 100 seconds exposure at ISO 800