After purchasing the camera kits Canon EOS 40D with the zoom lens 17-85mm IS USM I got used very quickly to the image stabilizer and want this not to miss. Now I have my old telephoto lens 70-200mm 1: 3.5-4.5 sold by Canon and me then the CANON 70-300mm IS USM 1: 4-5,6 gained with image stabilizer. I also have this change does not regret one second. Although it is a little fainter, making the stabilizer more than make up the balance of 3 f-stops. The APS-C 1.6 Umrechnugsfaktor the EOS 40D one comes to a focal length of no less than 480 mm. If one has not previously tested or seen it's really incredible, but you can actually take pictures with this focal length free from the hand and the images are still sharp. When shooting with a tripod, the lens automatically recognizes the firm stand and draw up the stabilizer. The Stabilizer function 2 is great; thereby correcting the lens only vertical camera shake and thus looking at the camera in shooting sports and "panning". The Locktaste is also extremely practical, because then you locked the retracted lens and it runs thus, when removed from the Fototache not separated from. The value for money is great, a Gegenlichblende supplied would have been nice, but that is probably only to be the lenses of the L-series. Yet this hidden (L) lens is worth the money and I would buy it immediately. Conclusion: 5 + stars!