Canon EF 70-200mm f/2.8L IS USM Autofocus Lens

First of all, this is the most complex lens Canon has ever constructed with 23 Elements in 18 Groups. No other lens in Canon Line up has this many Elements! Especially with 4 UD glass to produce sharp images. When I took the first picture with this lens, I was AMAZED that how sharp and fast the Auto Focus was! The motor is very quiet, and you feel some movement from the Image Stabilizer (IS)! Have a extra battery pack if you can afford one, or if you lucky and have one 1Ds or 1D Mark II N than you should be a fine! but the IS does tend to use 10-20% of the battery. Be sure to carry an extra battery Pack. You will not be upset with this lens! Be sure to research more about it in other forums and reviews! I looked at hundreds of web sites and researched over a couple of months before deciding on buying it! 1700 dollars from B&Hphoto.com! Get the US version! Import is less money, but you can never be sure if they come from a grey market. Happy Shooting