This in a nice sight in binoculars. It's located above and slightly west from M20 the Trifid Nebula. It's fairly bright and nice and big. Because of it's size it's a bit big for a telescope, and the view looses it's context, but never-the-less it's a fine group of distinctively brighter stars surrounded by the Milky Way's background stars. M23 has about 150 members which range around 250 million years old. They are about 2100 light years away.

10" F6.3 Schmidt Cassegrain Telescope, (1600mm F.L.) Canon 300D camera, placed at the scopes prime focus
6 photos aligned and averaged together, then brightness, color, and contrast enhanced. Click on photo above for a full frame full rez image.
Each photo, 100 seconds exposure at ISO 800