Tamron is a world wide leader in optics. Tamron USA makes fantastic photography lenses and I am proud to have them as one of my sponsors. I've worked with the folks at Tamron for years on newsletters, advertorials and photography education. They have helped sponsor my two solo photography exhibits. One of the things that I really like about Tamron is that they put a lot of effort into photography education. Check out Tamron's new SP line of lenses which are excellent. If you are looking for a new lens, rent a Tamron for the weekend and check them out, they are a terrific value proposition.