Canon proclaimed its update to the 70-200mm ƒ/2.8L IS leading up to CES2010. A go-to lens for many Canon professionals, the re-creation of the photograph zoom lens options a revision to the optical style (using five UD glass and one fluor glass element) and a rather nearer minimum focusing distance (1.2 meters rather than one.3). The EF lens is compatible with each sub-frame and full-frame detector camera bodies, and uses a continuing ƒ/2.8 aperture across all focal lengths. On a sub-frame body, the effective field of read for the lens is 112-320mm; on a body like the Canon 1D mark IV, with its APS-H-sized detector, the lens provides a good field of read of 91-260mm. The lens ships with the ET-87 petal-shaped lens hood, a lens case, and stand mount. The lens is accessible currently for around $2,450.
Beginning with the lens mounted on the sub-frame 20D, we tend to noted glorious results for sharpness in the slightest degree focal lengths, even wide open at ƒ/2.8. Performance at ƒ/2.8 isn’t tack-sharp, however it’s quite shut at around one.5 blur units. Stopping right down to ƒ/4 provides a marginal increase in performance, and at 100mm and ƒ/4 it’s so regarding as sharp as our testing will live. There square measure little gains from ƒ/5.6 onward, but the focal vary between one35mm and 200mm ne’er hits 1 blur unit; by ƒ/11, diffraction limiting begins to line in, and impacts on overall sharpness. At now it’s a lot of notable at 200mm, wherever we tend to see one.5 blur units; at the other focal lengths, we tend to still note glorious sharpness results, between one and one.5 blur units. Stopping down more impacts significantly on sharpness, till we tend to see between 2-2.5 blur units at ƒ/22, and around four blur units, fully stopped down at ƒ/32.
The full-frame 5D is even a lot of stern on the lens. Wide open at ƒ/2.8, the lens shows its best performance at 70mm, with a generous sweet spot of 1-1.5 blur units within the center of the frame, degrading slightly to some corner softness; around two blur units. From one00mm and up we tend to note increasing corner softness and a lessening of that sharp sweet spot till it’s simply over 1.5 blur units within the center and a pair of within the corners at 200mm.
Stopping down provides extra sharpness, but never will the lens reach absolute, 1-blur unit “tack” sharpness across the frame (it comes very shut, for instance 70mm at ƒ/8). Still, it’s totally sharp so. At ƒ/16 diffraction limiting has set in, with the lens providing a regular one.5 blur units across the frame. At ƒ/22 the lens shows two blur units across the frame, and curiously, at ƒ/32 it shows three blur units across the frame (as against the four blur units we tend to noted with the 20D at that aperture).
You have to peep terribly closely to the 100 percent crops of our sample pictures to discover any optical aberration at all with the Canon 70-200mm ƒ/2.8 II; that fluor part is clearly earning its keep. In short, there’s hardly any to talk of, and wherever it will show is within the corners at either 70mm or 200mm.
On the sub-frame 20D, corner shading is not a problem with this lens. the sole light slack to talk of is found at 200mm and ƒ/2.8, wherever the corners are simply over a quarter-stop darker than the middle. Not a lot of to write down home regarding.
On the full-frame 5D, it’s another story however, with vital corner shading once the lens is employed wide open. It’s slightly more forgiving at 70mm; at 100mm and larger, victimisation the lens at ƒ/2.8 produces corners that ar virtually a point darker than the middle. This reduces to a half-stop, a 3rd of a stop and a quarter-stop at ƒ/4, ƒ/5.6 and ƒ/8 severally. once used at 70mm, this lightweight deterioration reduces earlier, with the corners being solely a 3rd of a stop darker than the middle at ƒ/4, and fewer than a quarter-stop darker at ƒ/5.6.
Results for distortion ar typical of telephotograph zoom lenses, with some barrel distortion at the broader finish, and cushion distortion at the telephotograph finish. the purpose of convergence (where there’s neither variety of distortion) is balanced nicely at around 105mm. As you’d expect the distortion is not as vital with the lens mounted on the sub-frame 20D; it shows simply +0.25% barrel distortion within the corners at 70mm and -0.2% cushion distortion within the corners at 200mm. With the lens mounted on the full-frame 5D, it is a bit additional outstanding, with +0.5% barrel distortion within the corners at 70mm, and -0.5% cushion distortion within the corners at 200mm.
As an L-class lens with Canon’s USM focusing technology, there are not several lenses which is able to continue with the focusing speed of the EF 70-200mm ƒ/2.8L IS II USM. It takes well but a second to travel through the focusing vary. The lens makes virtually no noise because it will this. As well, optical device results may be overridden at any time by merely turning the focusing ring. The autofocusing speed also can be improved by limiting the focusing distance: a switch permits the user to pick between 2 focusing ranges, either 1.2m to eternity or two.5m to eternity. The front part of the lens doesn’t rotate throughout focusing, creating life that small bit easier for polarizer users.
While the lens is not supposed as a macro lens, its minimum close-focusing distance has been improved, at just 1.2 meters (just beneath four feet). The magnification is 0.21x.
Build Quality and Handling
Like all the white-body L-series Canon lenses, build quality on the EF 70-200 mm ƒ/2.8L IS II USM is phenomenal, incorporating seals for weather and dust-resistance. It’s designed sort of a tank, and admittedly weighs like one furthermore. this is often a awfully significant lens (over 3 pounds), not one that you are going to require to hand-hold all day. Combined with its image stabilization, a monopod with a ball head would be an excellent thanks to work with this lens. If you are doing have to be compelled to appendage it although, the IS works alright. Canon claims four f-stops of shake reduction, and that we are going to be hopefully be producing some proof to debate the accuracy of this claim within the close to future.
There ar many control and data points on the lens that ar price noting. in addition to the focus and zoom rings, there ar four command switches. From high to bottom, you’ve got the main focus clipper switch (described previously) and a switch to modify or disable optical device on the lens (“AF / MF”); there ar then 2 switches to regulate image stabilization. the primary activates or deactivates the system (“ON / OFF”) and also the second selects the image stabilization mode, mode one (for stabilization each horizontal and vertical motion) and mode two (for stabilising simply vertical motion, appropriate for panning shots). A window provides distance info in feet and meters, and whereas there’s no depth-of-field scale, there’s an infrared index. The focusing ring is kind of giant (slightly larger than the previous version, in fact), composed of rubber with little ribs concerning one 3/4 inches wide. The ring provides glorious manual focusing fidelity, with a rather sleek resistance and many of travel. The ring ends in soft stops on each ends of the focusing spectrum, and can focus past eternity.
The zoom ring consists of rubber with giant ribs, concerning one 1/4 inches wide. The ring takes concerning seventy degrees of turning action to travel from 70mm to 200mm, and again, the ring is extremely sleek, firm however not too tight; it needs 2 fingers to maneuver. Zoom creep is not a retardant with this lens, and there’s no lens extension throughout zoom operations. The ET-87 lens hood is petal-shaped, attaches via a bayonet mount, and adds concerning 3 and a [*fr1] inches to the length of the lens. the inside of the hood is flocked to scale back any stray lightweight, and there is a protection mechanism to stay the hood hooked up to the lens.
This one’s fairly straightforward: if you were wanting, you almost certainly were already wondering obtaining this lens, and there is nothing to fault it. If completely would like image stabilization and also the sharpest, best image quality in a very 70-200mm zoom, it’s cash well-spent. However, if you’re less meticulous, you almost certainly will not be unsuccessful with the tried-and-true original version of the 70-200mm f/2.8 IS, either. Canon’s created some spectacular fine-tuning changes to the lens, however in contrast to different makers, nobody was very fretful about the original version of the lens such a lot that it required a refresh.