What should I look for in digital cameras?

In the digital era, zoom lens design is sufficiently advanced to almost eliminate most of the market for non-SLR cameras with interchangeable lenses, so digital camera lens interchangeability is, in practice, mostly restricted to the digital SLR. A non-SLR camera can have a fixed lens which will zoom from medium wide-angle to medium telephoto, omitting only fish-eye and extreme telephoto. However, there are at least four advanced digital non-SLR cameras with interchangeable lenses (see "Compacts" below).