The Nikon AF-S Nikkor 70-200mm f/4G ED VR ($1,399.95 direct) is the low-cost alternative to Nikon's 70-200mm f/2.8 lens. It only captures half the light at its maximum aperture, but it costs $1,000 less.
Vibration reduction system; Fixed aperture through zoom range; Sharp images.
Tripod collar is an expensive add-on.