For recreational photography with a large CCD camera I like using a fixed focal point lens and storing in the largest possible format. With such large images it is easy to crop the image later and still end up with a great picture. It makes it possible to capture natural light images when it is not possible with a zoom lens (minimum f-stop is too large). It eliminates having to fiddle with yet another thing. In my case a very low f-stop 50mm lens is my go-to lens.