Imager and Maximum Resolution

• The Nikon D90 uses a 12.3-megapixel (4,288 by 2,848 pixels) complementary metal-oxide-semiconductor (CMOS) image sensor, a sensor type known for its low power requirements and low image noise. The D60 uses a 10.2-megapixel (3872 by 2592 pixels) charge-coupled device (CCD) imager.
  
  

Focus and Continuous Shooting

• The D90 has an 11-point 3D focus tracking mode and Live View with three contrast detection focus modes. None of these functions are available on the D60. The D90 shoots at 4.5 frames per second, whereas the D60 tops out at three.
  
  

Viewfinder and LCD monitor

• The Nikon D90 uses a pentaprism viewfinder at 0.94 times magnification, covering approximately 96 percent of the frame captured by the camera's imager. Its 3-inch LCD monitor displays 920,000 pixels. The D60's viewfinder is a pentamirror at 0.8 times magnification and 95 percent of the frame. Its 2.5-inch LCD only displays 230,000 pixels.
  
  

Weight

• The D60 weighs only 1 lb. without its battery installed and 1.2 lbs. with it. The D90 is slightly heavier at 1.4 with, and 1.6 lbs. without, its battery.
  
  

Additional Features

• The D90 includes active D-lighting, automatically brackets exposures and compensates for chromatic aberration. It can shoot HD video at 720p and 24 frames per second. None of these features are included on the D60.