This is a superb lens. I've just got back from a 2 week vacation in California and have been using it for wildlife and scenery shots and the results are excellent even in difficult conditions such as shooting into the light. About the only downside is that it's rather large and heavy - but that's unavoidable given the zoom range and quality. I'm still looking for the perfect way to carry it when it's attached to the camera and I need both hands free to climb over things - I'm planning try some sort of shoulder strap attached to the tripod bush on the lens. Expensive but highly recommended.
Wonderful lens at a reasonable price. As a relative novice I had been using a standard Canon lens (70-300mm) which I was very happy with but wanted greater zoom to capture wildlife photographs. The difference between this professional L-series lens and my original standard Canon lens is noticeable and I'm extremely happy with the enhanced image quality as well as the increased range.
Given its substantial cost, it took me a long time to decide to buy this lens. I'm so glad I did. It has lived up to and surpassed all my expectations. The lens is super sharp of course, but it's the image stabilisation and focus speed that make it a joy to use. If you decide to buy one, you will not be disappointed.
My Canon 400mm lens arrived promptly and in excellent condition. I have taken some excellent photographs with this piece of equipment and it has enabled me to capture some magical wildlife pictures. The quality of the Canon lens is exceptional and it comes with a delightful carry case too!
Only had it a short time but the results are amazing...so clear. I have taken shots at 400mm, hand held down to 1/80s and the shot is perfect. The IS system seems better than my EF24-105mm L! And the optics are superb.
The lens is really good in all ways. It is sharp fully open and has fast focussing. The stabiliser works a treat and lives up to expectations either when doing macro work or long distance photography. An absolute winner from Canon.