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Zoom lenses are very convenient. The equivalent of two or more fixed focal length lenses in one unit. The maximum aperture of some zoom lenses changes as you alter the focal length, but through-the-lens (TTL) metering takes this into account to give correct exposure.
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.
I bought the lens specifically for cricket, and I have found it versatile, as well as superb at the top end of the zoom. Read morePublished 1 month ago by David Morton
I was given the loan of this lens for a fortnight while I was up in Scotland and needed something a bit longer than my 70-200 L to capture the local wildlife. Read morePublished 1 month ago by M. Hadfield
A newer version has come out with a twist ring zoom control. This model is now available at a budget price but still has that Canon quality. With Standard Picture Style ie. Read morePublished 2 months ago by dBH
Great piece of kit. Straight into taking great shots. My first big lensePublished 2 months ago by Mr.D.C.GUTTERIDGE
Great for wildlife really brings them in close, a bit on the heavy side though but this is the older version.Published 2 months ago by Tech Man
Just love this lens. The picture quality is excellent and it's my go to lens for fast action shots eg airshows etc. Read morePublished 3 months ago by jpm
Certainly a heavyweight lens but the quality is fantastic, quick focusing ,and the slide pump action zoom is no detrimentPublished 5 months ago by P. Stephenson
I purchased the 100 400 because I wanted long reach and to photograph church gargoyles horse shows, wild birds and maybe sports, and the like. Read morePublished 6 months ago by freddie lewis