Hello all. I just received this lens, from Prodigital2000.com. It is a Canadian firm I found on Ebay. They are an authorized dealer and Tamron Canada honors the full 6 year warranty. The price was excellent and I thank David for getting me such a deal. I paid less than the $680 shown. I took a couple of hand-held landscape pics and zoomed (200mm) moon images (on a tripod). I am impressed with the focus, clarity and range. Even after I downloaded the moon images, and further zoomed in (in IPhoto). the details are clear. This will be my travel-do all lens for my Sony NEX 6. I hope this info will help someone else get a good deal as well.