I just bought a Sigma 10-20mm EX of Amazon, with a 4 year warranty, plus a 5 year extended warranty. But my warranty card is from Sigma Corportation JAPAN! the extended warranty was from some pleace called "Repair Tech" online. Is this a grey market product???? How can i find out? Can i contact Sigma and find out? What should I do about this, what if my lens breaks, am i **** out of luck?
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