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Canon offers this first EF telephoto zoom lens with a high-magnification zoom range of 100 to 400mm. This is the first L type zoom lens with IS (Image Stabilizer) system. The dual-mode IS mechanism corrects camera shake blurring equivalent to two shutter speed steps. The IS Mode-1 works for normal shooting and IS Mode-2 is suitable for panning shots of a moving subject, stabilizing images in viewfinder.
The optical system uses one artificial crystal fluorite and one Super UD (Ultra-low Dispersion) glass lens elements (3rd and 7th), which thoroughly correct chromatic aberration. The minimum focusing distance of 1.8m is achieved throughout zooming range. The floating system in rear focusing system is employed for the first time for EF zoom lens to achieve a high definition for the entire focusing range.
A ring USM (Ultrasonic Motor) drives high-speed and silent AF and full-time manual focusing. Linear zooming design with zooming friction adjustment ring gives a good operability of this lens.
Good service, good product,very satisfied, "Just what doctor ordered), thank you so much.Published 1 day ago by Keith Street
Best purchased ever made for a great price. Great lens for wildlife photography, works for me, lens cap is pretty big and the product is heavy however the photo quality is great... Read morePublished 29 days ago by SimplyCreative
This lens is a beast. Not the lightest of things to carry but it's a good bit of very rugged kit. If you're serious about photography then this will not disappoint. Read morePublished 1 month ago by Steven J Edwards
[This is an edited version of my original review].
Others have given some useful reviews. Read more
well please with the results from this lens. Focuses quickly and quietly. A little on the heavy side but manageable. you can use a single leg support if neededPublished 5 months ago by MR PHILIP E LAWTON
Ive had this lens for about a month, and have been using it exclusively, I wanted to use it for a while before I wrote the review. Read morePublished 7 months ago by Lee McG