The camera I use for taking these pictures is the (already old-fashioned, but still perfect) Olympus C-1Zoom digital camera. Although it only has a 1.3Mpixel CCD, the quality of the pictures is very good. The pictures are sharp and the colors are vivid. It's small, so you can take it everywhere.
General description of the Olympus C-1Zoom camera
Technical description of the Olympus C-1Zoom camera