There are certain features in some cameras such as the follow focus which may need a third party accessory to make it all happen. However in the case of some cameras such as the Canon 7D, you may have to be inventive about it. Something like what this person did when he made use of ...

Aiptek provides consumers with a stunning HD camcorder capable of taking HD 1080p videos at 30 frames per second. Also, it can record at 60 frames per second at 720p with the support of H.264 technology. The Aiptek Action HD GVS 1080p HD Camcorder can also capture 5 MP images with macro lenses for higher quality ...