These days, it's common for digital cameras to be able to record HD-quality video. But many digital cameras have limits on how long they can record video for.

The Panasonic Lumix DMC-ZS3 and DMC-TZ7 are identical compact digital cameras that both take HD-quality video in the relatively new AVCHD Lite video format. The only difference between the two models is that the ZS3 can record unlimited continuous HD-quality video, while the TZ7 cannot.