Ordered a Tamron Lens, which 47th Street Photo stated had a 6 year manufacturers warranty. One year later, the lens started to have problems, so we contacted 47th Street Photo and Tamron. 47th Street Photo didn't return calls or emails, and Tamron informed us that the camera we bought from 47th Street Photo did not have a valid serial number and must have been a grey market lens so it was not covered by the warranty. So we are out the lens and the money.