Lens Compatibility

• The N90 is compatible with all AF-S lenses, whereas the N60 is not. AF-S refers to the Nikon auto-focus silent wave motor and uses a motor that interacts with your camera to focus automatically. The N60's lack of compatibility makes it difficult to find lenses.
  
  

Features

• The N60 lacks many features that are present on the N90, such as having only one focus sensor and a very slow motor drive. The N60 doesn't have a depth of field preview button, meaning there is no way to verify your total focus area when shooting at higher f-stop numbers.
  
  

Price & Production

• The N90 was marketed as a top-level amateur and hobbyist camera; it was one of Nikon's most expensive, retailing at more than $1,000, even with a discount. The N90 was manufactured throughout the 1990s, whereas the N60 came on the market in 1998. Both models were discontinued in 2001; the N60's short, three-year life span is representative of its inferior quality.