When Aperture 3 sees the raw photos on the camera for import the photos look good. Then when they are imported and Aperture processes them they then change into black or digital noise and not one is viewable. using a Nikon D80 in raw mode, Macbook pro with 2gb ram. Can you help
I use Lightroom, but I believe the effect is the same. When your camera saves the raw file, it renders a lower quality jpeg with whatever settings your camera is using. When you first open that raw file in Aperture/Lightroom etc, it shows you that preview jpeg from your camera for a few seconds before the interal processing kicks in.
If you find you prefer the original look, you can always use the software provided with your camera to process the image, but you lose the organizational and workflow benefits of Lightroom.
Ensure that you have updated aperture and have the latest patch to handle your raw files. Raw files all have different formats and aperture is updated to support these. You may want to view the files through "finder" and see if they appear correctly as OS X can preview raw files. If you see nothing you do not have the raw support for your camera installed.