The Tamron SP 24-70mm f/2.8 Di VC USD excels at the DXO Mark bench: "When mounted on a Canon 5D Mark II, the Tamron SP 24-70mm F2.8 Di VC USD achieves an overall DxOMark Score of 24, the 2nd highest score in our database for a high-speed zoom."

So, the Tamron manages to closely match such expensive and optically well endowed lenses as the Canon 24-70mm f2.8L USM II, and the Nikkor 24-70mm G ED, both costing around the 2 grand mark in every major western currency:

"The Tamron SP 24-70mm f/2.8 Di VC USD is in the top three best performing high-speed standard zooms currently available. We’ve only looked at the imaging performance, but it’s as impressive optically as the highly regarded Nikon AF-S Nikkor 24-70mm f2.8G ED. At $1,299 it’s not cheap but it is competitively priced – to improve on the image quality you would have to spend $1,000 for the sublime Canon EF 24-70mm f/2.8 II USM. Dropping down . . . read more

Roget Cicala at RelsRentals dissects the Canon 24-70mm f/2.8 Mk II, the Nikon 24-70mm G ED f/2.8 AF-S, and the Tamron 24-70 f/2.8 Di VC, just to see what they look like from the inside.

"We’ve been doing a lot of teardowns lately and I’ve made comments like “well thought out” or “carefully engineered.” Several people have asked me to show them some comparisons so they can see what I’m talking about. Given that we have fairly modern releases of 24-70mm f/2.8 lenses from several manufacturers, we thought it would make sense to compare what the insides look like.

This will largely examine the electro-mechanical mechanisms in the lenses. But just for completeness here are the optical diagrams for all 3. The Canon is the most optically complex, containing 18 elements in 13 groups. The Tamron has 17 . . . read more

Tamron SP 24-70mm F/2.8 Di VC USD Review at Camera Labs

Tamron's intention with the SP (Special Performance) line is to play in the league of big boys, like Canon's "L" lenses, but at a lower price point. The experiment has been mostly successful:

"Focus accuracy and repeatability is critical to consistently produce sharp shots. Repeatability (the accuracy of focus on the same subject after repeated focus-acquisition) of this lens is excellent with no outliers over a series of 20 shots. And there is . . . read more

Tamron SP 24-70mm f/2.8 DI VC USD review by Nasim Mansurov

"Just like the Nikon 24-70mm f/2.8G, the Tamron 24-70mm f/2.8 feels very solid in hands. Although its barrel is made of plastic (versus the all-metal construction of the Nikon 24-70mm) it does not have a cheap or “plasticky” feel to it at all. Keep in mind that plastic does not expand and contract like metal does when temperatures change quickly, which can actually prolong the life and performance of a lens. All new Nikon AF-S primes, even the most expensive ones like the Nikon . . . read more

Tamron SP 24-70mm F/2.8 Di VC USD Review at the Photography blog

This phrase from the review sums it up really well:

"Tamron's lens doesn't have quite the same build-quality as the Big Two, but the USM focusing is fast and quiet, the construction is shower-proof and most importantly the image quality is excellent." . . . read more

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