Just looked at the specs, and if I'm reading this correct, you can set the exposure to a maximum of 15 seconds:
SHUTTER
Type Mechanical shutter & electronic shutter
Speed 15 - 1/2,500 sec
(Slow Shutter speeds of 1.3 sec. and more, available in Manual and Shutter Priority AE modes only. Shutter speeds of 1.3 sec. and more operate with noise reduction. Certain combinations of shutter speed and aperture may not be available.)
There will be a setting in Manual mode on the camera to adjust it