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Old Jul 16, 2012, 8:16 AM   #11
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The 'old' stabilized version wasnt too good but by all accounts the newer lenses are fine
The 'Old' stabilized Tamron 17-50/2.8 and the 'New' stabilized Tamron 17-50/2.8 are the same lens. Any changes they might have made (I say 'might' because Tamron usually changes the model number when it changes a lens, and the model number 'B005' is unchanged.) would certainly have just been cosmetic.
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Old Jul 16, 2012, 3:54 PM   #12
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No, there have been differences. The ones made in Japan recently are far superior to the 'Chinese' ones.
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Old Jul 16, 2012, 4:22 PM   #13
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... but the "Old" ones were made in Japan. The ones made in China may or may not be as good as the ones made in Japan, but the ones that were tested by SLRGear.com and PhotoZone.de and found wanting were the "Old" ones.
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Old Jul 17, 2012, 3:46 AM   #14
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Correct. China and Japan make the lens but the recent ones from Japan are proving to be really good now
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Old Jul 17, 2012, 5:27 AM   #15
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"Proving" how?

Did the optical design change? No.
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Old Jul 17, 2012, 6:59 AM   #16
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"Proving" how?

Did the optical design change? No.
There were flaws in the originals which made them less reliable. The newer models are much more superior in build etc.
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Old Jul 17, 2012, 9:20 AM   #17
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There were flaws in the originals which made them less reliable. The newer models are much more superior in build etc.
But did the optical performance change? I suspect not.

It's the same optical design that was tested once by SLRGear.com [ http://www.slrgear.com/reviews/showp...ct/1297/cat/23 ] and three times by PhotoZone.de [ http://www.photozone.de/canon-eos/48..._canon?start=1 http://www.photozone.de/nikon--nikko...28vcdx?start=1 and http://www.photozone.de/nikon--nikko...28vcdx?start=1 ] all of which produced similar results despite the fact that the two sites use different testing methods.

The fact is that the only good, stabilized, large aperture, standard zoom lens is Canon's EF-S 17-88mm f/2.8 IS USM, which costs $1,099 (after an $80.00 Instant Rebate.) Everything else from Tamron and Sigma falls short of either the Canon or the unstabilized Tamron.

As far as stabilized, large aperture, standard zoom lenses goes, the Sigma 17-50/2.8 is better than the Tamron, but even it's not as good as the Canon.
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Old Jul 17, 2012, 12:26 PM   #18
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They are old reviews with the older manufactured lens. The newer VC is much more superior
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Old Jul 17, 2012, 12:57 PM   #19
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The optics didn't change over the years. Perhaps you would kindly explain the improvement.
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Old Jul 17, 2012, 1:32 PM   #20
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just to add another to the mix sigma 17-70os really good all rounder
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