Canon EF 24-70mm f/4L IS USM lens Review by Andrew Alexander at SLR Gear: 'Performance at 50mm was unacceptable, even after we had to go through 3 copies of this lens to find the best one."

Canon EF 24-70mm f/4L IS USM lens Review by Andrew Alexander at SLR Gear: 'Performance at 50mm was unacceptable, even after we had to go through 3 copies of this lens to find the best one."

Another day, another review, and another case of a bad copy lens, an issue I too was confronted with time and again when i bough expensive Canon Glass in the past. Canon L=Lazy quality control? 

"Canon made a smart decision to offer a lower-priced alternative to its 24-70mm ƒ/2.8, in order to give Canon shooters of the more casual or economical nature a way to stay true to the brand name. Unfortunately the lens' performance at 50mm stands out as unacceptable, especially when you consider the lower-priced option here still costs $1,500. Coupled with the fact that we had to seek out the best version to get even these results, this does not breed confidence in the lens.

So what is a Canon shooter to do? If you're happy with the performance you see from our sample pictures, and you need or want the image stabilization and macro capabilities of the 24-70mm ƒ/4, then you should be happy with your purchase - assuming you get as good a copy as we did, and not something worse. If you demand absolute image quality in this range of focal lengths, you'll have to be prepared to invest in the 24-70mm ƒ/2.8L II USM. For everyone else, I don't see a compelling reason not to go to the tried-and-true 24-105mm ƒ/4L IS USM. It offers image stabilization, a longer telephoto focal length, and similar but more consistent optical performance, all for a lower price tag."

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