much less expensive but has variable aperture not constant f/4
new Nikon AF-S 70-200mm f/4G VR lens
introduced in 2012
smaller, lighter, much less expensive, closer focusing, with perhaps better optical quality and VR than the Nikon AF-S 70-200mm f/2.8G VRII lens but you do lose a stop of aperture
“lens barrel is constructed form high quality plastics and the lens mount is metal, with a rubber gasket to help prevent the ingress of dust and moisture into the camera. Unfortunately the lens itself is not weather sealed though”
“delivers sharp, contrasty images, focuses fast and isn't so heavy that you'd regret packing it in your camera bag”