PROS
* Very strong through the image, even when open.
* Low Chroma. I read a test ([...]) which is higher than the normal amount of CA in this objective in some gaps, but I do not see. My boss is to shoot the naked branches of trees on a sunny day and look for purple fringing, especially around the edges. I do not see anywhere near the level of margin is shown in some of their tests shots.If anything, I would call "low," I said elsewhere that one of the objectives of Canon to add to this the aspherical lens element CA will be reduced, so I'm thinking that maybe the goal was tested in only one rotten apple photozon.de.
Image * Shake control works. I can not attest to the frequency with which offers a total of four stops to shake off, but I can see a very clear result when used.
* Requires a fast approach. One of the reasons why you bought this lens because I was not satisfied with my performance (more expensive) Sigma 17-35 EX (latest model), which while strong, is very slow and imprecise a viewer for work closely in the action sports. The new Canon solved the problem.
Weight, compact, lightweight and unobtrusive. Not much bigger than a normal lens.
CONS
* Barrel distortion at 18mm (28mm) exsessive While not an inexpensive lens, this is an area where the benefit of spending hundreds of dollars for a much more expensive canon "is" or "L", or buy a focal length of the target. In most real world situations, it was not all that remarkable. Usually can be corrected in Photoshop, but this is not a target for the critical work of architecture, etc. took hundreds of pictures with this lens and barrel distortion is only called attention to himself at times. I suspect this is a price to pay for the very compact design.
* Not very fast. Another area in which an "L" has an advantage. Equivalent to 28mm F3.5 to F5.6 85 mm lens and this is relatively slow compared to a professional lens. This affects the direct action in low light. OTH, you have to spend hundreds more to get a usable top speed of F 2.8 and that is * only * a quick stop at 28 mm equiv. I think both the sharpness of this objective "and the system is to reduce this" Con ". It took me a while to learn that he could pull open at all focal lengths without the outer third of the very striking image mush.That" s for to zoom at this price. You do not have one or two points that are rarely used because it is very soft. And the system works well in low light, however, that does not appear to stop the action.
They have that red stripe. Unfortunately, some will not buy this lens is not very useful acute because there is an "L" and / or costs $[...]. Yes, it looks like a "plasticy" some probably do not have the build quality for heavy use, every day for a real professional job, and it seems riding his huge body of the camera lens as a "quick fix" , which pro is squeezing out that last F stop. However, IMO, is very similar to the Canon lens is new, so there is no scarlet letter immediately identify it as "cheap." In other words, "Get over it."
So why did Canon produce a good target a bargain price? I would say is that Nikon has announced its intention to do so recently. Moreover, not old is the Canon 18-55mm was the representative to be something of a dog. Finally, several competitors have cameras now integrated into the body. Canon had to respond with a stronger goal that could put the rebels and the 40D. In terms of sales, the market for low-end digital SLR is hot and very competitive. We are the beneficiaries.
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