The Advanced Camera Tools plugin lets you work with real-world cameras in your SketchUp Pro 8 models. Cameras you create with the ACTs provide precise controls for settings like Focal Length, Aspect Ratio and Image Width, which allows you to accurately preview real camera shots right inside SketchUp.
You can download the ACT plugin for free: http://goo.gl/pmopn
Learn more about Google SketchUp at http://sketchup.google.com