With the release of Aperture 3, exploring all the new features can be an exciting yet overwhelming task. Here is a list of the over 200 new features available in Aperture 3.
Tethered shooting support
Connect a supported camera directly to your Mac via FireWire or USB, controlling it using the Tether HUD. Aperture saves captured images in a selected project and displays them onscreen, allowing you to review them and make lighting or other changes before committing to the shot.
Be sure to set your destination folder before you being your session. (File>Tether>Start Tether)Aperture