Adobe Photoshop can open NEF files from most Nikon cameras if you have downloaded and updated the Adobe Camera Raw plugin (Also commonly known as ACR for short). Since NEF is a raw representation of data captured by the photosites on the sensor, they are stored without any manipulation. The 12/14 bits RGB pixel data are not demosaiced in a NEF file. For TIFF, the 16 bit RGB values are demosaiced.
I see that. much appreciated for your idea. hmm... not really sure about the demosaiced word but i'm gonna find out