The lens comes with a 6 year warranty from Tamron USA.
Over the course of our 30 years in business, we here at B+H have discerned no difference in cameras manufactured or assembled in (for instance) Korea or Thailand than in identical models assembled or manufactured in (for instance) Japan.
We have determined that when any of the companies whose products we sell moves a manufacturing or assembly facility "off shore" they do so in order to maintain low prices while continuing to offer equal product quality and reliability. The manufacturing or assembly facilities moved off-shore maintain equal quality control and employee training/supervision and use equal raw materials, and continue to monitor facility output with equal care and attention to detail. In addition, you the customer receive that manufacturers warranty, guaranteeing your product works up to the standards of a given items specifications.
Since components are of! ten manufactured in one facility, subassemblies then manufactured in a second and final assembly conducted in a third, no matter what country of origin is labeled on the box, the REAL origin is often obscure or is actually a combination of two or three locales. A true Global Economy.
When B&H enters into an agreement with, for example, Canon USA to purchase from them (for example) a quantity of 550EX flash units we do not (and could not) specify to Canon USA the country of origin of the merchandise we will eventually receive. There are two reasons for this. First, Canon USA may not be able to dictate this to their parent company, and second there may only be one final assembly facility for a particular product.
In other words, our Canon USA rep doesn't know which facility the item will come from, if there's more than one and our Canon USA rep doesn't even know if there's more than one in the first place.
Finally, we here at B+H agree with PopPhoto's es! teemed senior editor, Herbert Keppler. In the February, 2000 issue, P opular Photography's Herbert Keppler wrote, "...the Japanese have maintained near-fanatical tight control over their 'offshore' production facilities and it's worked." He further wrote, "Having visited many Japanese factories ...as well as off-shore plants, I can report that quality is uniform no matter where the products are made." I have no reason to dispute a single word of this.
Sales associates here at B+H are physically separated from the warehouses and, for security purposes, do not have access to them. We do not know the country where these items were manufactured, nor can I check.