The full description of this lens is as follows: Nikon Zoom Telephoto AF VR 70-300mm f/4.5-5.6 Nikkor IF-ED AF-S Autofocus Lens with Vibration Reduction.
One of my most recently purchased lenses for my Nikon D50 was this 70-300mm- I LOVE this lens so far! It does have a bit of a learning curve, so I highly suggest reading the manual before using it, and it helps to have a good working knowledge of your camera first as well.
I have mainly used this lens so far with sports shots- particularly the football team my husband coaches, and I have been able to get clear, precise photos with this lens. The vibration reduction feature definitely adds to the price, but in my opinion well worth it, especially if you plan on using the 300mm setting much. I have taken the same photo with and without vibration reduction on at both short and long focal lengths to see the difference, and the ones with the VR turned on were much much sharper at any focal length. I also like that there are different types of vibration reduction- for taking action sports shots, and ones for panning, or if you are shooting from a moving vehicle.
This lens is quite heavy- 1.6 lbs, and when it is combined with the included lens hood, it is quite long also. This can be cumbersome if you are in a close crowd, or if you are carrying the lens on your camera body for a long time. Also, make sure you check with your camera bag to make sure it can accomodate this lens.
Just a couple other facts about this lens:
67 mm filter size, minimum focus distance: 4.9 feet, ED Glass, Silent Wave Motor, Internal Focusing.
All in all, I have been very happy with this lens- a little pricey, but when you see some of the shots that you will be able to get, it will be well worth it!